| // SPDX-License-Identifier: GPL-2.0-only |
| |
| #include <net/sock.h> |
| #include <linux/ethtool_netlink.h> |
| #include <linux/pm_runtime.h> |
| #include "netlink.h" |
| |
| static struct genl_family ethtool_genl_family; |
| |
| static bool ethnl_ok __read_mostly; |
| static u32 ethnl_bcast_seq; |
| |
| #define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS | \ |
| ETHTOOL_FLAG_OMIT_REPLY) |
| #define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS) |
| |
| const struct nla_policy ethnl_header_policy[] = { |
| [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 }, |
| [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING, |
| .len = ALTIFNAMSIZ - 1 }, |
| [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32, |
| ETHTOOL_FLAGS_BASIC), |
| }; |
| |
| const struct nla_policy ethnl_header_policy_stats[] = { |
| [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 }, |
| [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING, |
| .len = ALTIFNAMSIZ - 1 }, |
| [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32, |
| ETHTOOL_FLAGS_STATS), |
| }; |
| |
| int ethnl_ops_begin(struct net_device *dev) |
| { |
| int ret; |
| |
| if (!dev) |
| return -ENODEV; |
| |
| if (dev->dev.parent) |
| pm_runtime_get_sync(dev->dev.parent); |
| |
| if (!netif_device_present(dev) || |
| dev->reg_state == NETREG_UNREGISTERING) { |
| ret = -ENODEV; |
| goto err; |
| } |
| |
| if (dev->ethtool_ops->begin) { |
| ret = dev->ethtool_ops->begin(dev); |
| if (ret) |
| goto err; |
| } |
| |
| return 0; |
| err: |
| if (dev->dev.parent) |
| pm_runtime_put(dev->dev.parent); |
| |
| return ret; |
| } |
| |
| void ethnl_ops_complete(struct net_device *dev) |
| { |
| if (dev->ethtool_ops->complete) |
| dev->ethtool_ops->complete(dev); |
| |
| if (dev->dev.parent) |
| pm_runtime_put(dev->dev.parent); |
| } |
| |
| /** |
| * ethnl_parse_header_dev_get() - parse request header |
| * @req_info: structure to put results into |
| * @header: nest attribute with request header |
| * @net: request netns |
| * @extack: netlink extack for error reporting |
| * @require_dev: fail if no device identified in header |
| * |
| * Parse request header in nested attribute @nest and puts results into |
| * the structure pointed to by @req_info. Extack from @info is used for error |
| * reporting. If req_info->dev is not null on return, reference to it has |
| * been taken. If error is returned, *req_info is null initialized and no |
| * reference is held. |
| * |
| * Return: 0 on success or negative error code |
| */ |
| int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info, |
| const struct nlattr *header, struct net *net, |
| struct netlink_ext_ack *extack, bool require_dev) |
| { |
| struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)]; |
| const struct nlattr *devname_attr; |
| struct net_device *dev = NULL; |
| u32 flags = 0; |
| int ret; |
| |
| if (!header) { |
| NL_SET_ERR_MSG(extack, "request header missing"); |
| return -EINVAL; |
| } |
| /* No validation here, command policy should have a nested policy set |
| * for the header, therefore validation should have already been done. |
| */ |
| ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header, |
| NULL, extack); |
| if (ret < 0) |
| return ret; |
| if (tb[ETHTOOL_A_HEADER_FLAGS]) |
| flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]); |
| |
| devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME]; |
| if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) { |
| u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]); |
| |
| dev = dev_get_by_index(net, ifindex); |
| if (!dev) { |
| NL_SET_ERR_MSG_ATTR(extack, |
| tb[ETHTOOL_A_HEADER_DEV_INDEX], |
| "no device matches ifindex"); |
| return -ENODEV; |
| } |
| /* if both ifindex and ifname are passed, they must match */ |
| if (devname_attr && |
| strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) { |
| dev_put(dev); |
| NL_SET_ERR_MSG_ATTR(extack, header, |
| "ifindex and name do not match"); |
| return -ENODEV; |
| } |
| } else if (devname_attr) { |
| dev = dev_get_by_name(net, nla_data(devname_attr)); |
| if (!dev) { |
| NL_SET_ERR_MSG_ATTR(extack, devname_attr, |
| "no device matches name"); |
| return -ENODEV; |
| } |
| } else if (require_dev) { |
| NL_SET_ERR_MSG_ATTR(extack, header, |
| "neither ifindex nor name specified"); |
| return -EINVAL; |
| } |
| |
| req_info->dev = dev; |
| if (dev) |
| netdev_tracker_alloc(dev, &req_info->dev_tracker, GFP_KERNEL); |
| req_info->flags = flags; |
| return 0; |
| } |
| |
| /** |
| * ethnl_fill_reply_header() - Put common header into a reply message |
| * @skb: skb with the message |
| * @dev: network device to describe in header |
| * @attrtype: attribute type to use for the nest |
| * |
| * Create a nested attribute with attributes describing given network device. |
| * |
| * Return: 0 on success, error value (-EMSGSIZE only) on error |
| */ |
| int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev, |
| u16 attrtype) |
| { |
| struct nlattr *nest; |
| |
| if (!dev) |
| return 0; |
| nest = nla_nest_start(skb, attrtype); |
| if (!nest) |
| return -EMSGSIZE; |
| |
| if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) || |
| nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name)) |
| goto nla_put_failure; |
| /* If more attributes are put into reply header, ethnl_header_size() |
| * must be updated to account for them. |
| */ |
| |
| nla_nest_end(skb, nest); |
| return 0; |
| |
| nla_put_failure: |
| nla_nest_cancel(skb, nest); |
| return -EMSGSIZE; |
| } |
| |
| /** |
| * ethnl_reply_init() - Create skb for a reply and fill device identification |
| * @payload: payload length (without netlink and genetlink header) |
| * @dev: device the reply is about (may be null) |
| * @cmd: ETHTOOL_MSG_* message type for reply |
| * @hdr_attrtype: attribute type for common header |
| * @info: genetlink info of the received packet we respond to |
| * @ehdrp: place to store payload pointer returned by genlmsg_new() |
| * |
| * Return: pointer to allocated skb on success, NULL on error |
| */ |
| struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd, |
| u16 hdr_attrtype, struct genl_info *info, |
| void **ehdrp) |
| { |
| struct sk_buff *skb; |
| |
| skb = genlmsg_new(payload, GFP_KERNEL); |
| if (!skb) |
| goto err; |
| *ehdrp = genlmsg_put_reply(skb, info, ðtool_genl_family, 0, cmd); |
| if (!*ehdrp) |
| goto err_free; |
| |
| if (dev) { |
| int ret; |
| |
| ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype); |
| if (ret < 0) |
| goto err_free; |
| } |
| return skb; |
| |
| err_free: |
| nlmsg_free(skb); |
| err: |
| if (info) |
| GENL_SET_ERR_MSG(info, "failed to setup reply message"); |
| return NULL; |
| } |
| |
| void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd) |
| { |
| return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| ðtool_genl_family, 0, cmd); |
| } |
| |
| void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd) |
| { |
| return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0, |
| cmd); |
| } |
| |
| int ethnl_multicast(struct sk_buff *skb, struct net_device *dev) |
| { |
| return genlmsg_multicast_netns(ðtool_genl_family, dev_net(dev), skb, |
| 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL); |
| } |
| |
| /* GET request helpers */ |
| |
| /** |
| * struct ethnl_dump_ctx - context structure for generic dumpit() callback |
| * @ops: request ops of currently processed message type |
| * @req_info: parsed request header of processed request |
| * @reply_data: data needed to compose the reply |
| * @pos_hash: saved iteration position - hashbucket |
| * @pos_idx: saved iteration position - index |
| * |
| * These parameters are kept in struct netlink_callback as context preserved |
| * between iterations. They are initialized by ethnl_default_start() and used |
| * in ethnl_default_dumpit() and ethnl_default_done(). |
| */ |
| struct ethnl_dump_ctx { |
| const struct ethnl_request_ops *ops; |
| struct ethnl_req_info *req_info; |
| struct ethnl_reply_data *reply_data; |
| int pos_hash; |
| int pos_idx; |
| }; |
| |
| static const struct ethnl_request_ops * |
| ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { |
| [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops, |
| [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops, |
| [ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops, |
| [ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops, |
| [ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops, |
| [ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops, |
| [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops, |
| [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops, |
| [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops, |
| [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops, |
| [ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops, |
| [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops, |
| [ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops, |
| [ETHTOOL_MSG_FEC_GET] = ðnl_fec_request_ops, |
| [ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops, |
| [ETHTOOL_MSG_MODULE_EEPROM_GET] = ðnl_module_eeprom_request_ops, |
| [ETHTOOL_MSG_STATS_GET] = ðnl_stats_request_ops, |
| [ETHTOOL_MSG_PHC_VCLOCKS_GET] = ðnl_phc_vclocks_request_ops, |
| [ETHTOOL_MSG_MODULE_GET] = ðnl_module_request_ops, |
| [ETHTOOL_MSG_PSE_GET] = ðnl_pse_request_ops, |
| [ETHTOOL_MSG_RSS_GET] = ðnl_rss_request_ops, |
| }; |
| |
| static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) |
| { |
| return (struct ethnl_dump_ctx *)cb->ctx; |
| } |
| |
| /** |
| * ethnl_default_parse() - Parse request message |
| * @req_info: pointer to structure to put data into |
| * @tb: parsed attributes |
| * @net: request netns |
| * @request_ops: struct request_ops for request type |
| * @extack: netlink extack for error reporting |
| * @require_dev: fail if no device identified in header |
| * |
| * Parse universal request header and call request specific ->parse_request() |
| * callback (if defined) to parse the rest of the message. |
| * |
| * Return: 0 on success or negative error code |
| */ |
| static int ethnl_default_parse(struct ethnl_req_info *req_info, |
| struct nlattr **tb, struct net *net, |
| const struct ethnl_request_ops *request_ops, |
| struct netlink_ext_ack *extack, bool require_dev) |
| { |
| int ret; |
| |
| ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr], |
| net, extack, require_dev); |
| if (ret < 0) |
| return ret; |
| |
| if (request_ops->parse_request) { |
| ret = request_ops->parse_request(req_info, tb, extack); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ethnl_init_reply_data() - Initialize reply data for GET request |
| * @reply_data: pointer to embedded struct ethnl_reply_data |
| * @ops: instance of struct ethnl_request_ops describing the layout |
| * @dev: network device to initialize the reply for |
| * |
| * Fills the reply data part with zeros and sets the dev member. Must be called |
| * before calling the ->fill_reply() callback (for each iteration when handling |
| * dump requests). |
| */ |
| static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data, |
| const struct ethnl_request_ops *ops, |
| struct net_device *dev) |
| { |
| memset(reply_data, 0, ops->reply_data_size); |
| reply_data->dev = dev; |
| } |
| |
| /* default ->doit() handler for GET type requests */ |
| static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct ethnl_reply_data *reply_data = NULL; |
| struct ethnl_req_info *req_info = NULL; |
| const u8 cmd = info->genlhdr->cmd; |
| const struct ethnl_request_ops *ops; |
| int hdr_len, reply_len; |
| struct sk_buff *rskb; |
| void *reply_payload; |
| int ret; |
| |
| ops = ethnl_default_requests[cmd]; |
| if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) |
| return -EOPNOTSUPP; |
| if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr)) |
| return -EINVAL; |
| |
| req_info = kzalloc(ops->req_info_size, GFP_KERNEL); |
| if (!req_info) |
| return -ENOMEM; |
| reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); |
| if (!reply_data) { |
| kfree(req_info); |
| return -ENOMEM; |
| } |
| |
| ret = ethnl_default_parse(req_info, info->attrs, genl_info_net(info), |
| ops, info->extack, !ops->allow_nodev_do); |
| if (ret < 0) |
| goto err_dev; |
| ethnl_init_reply_data(reply_data, ops, req_info->dev); |
| |
| rtnl_lock(); |
| ret = ops->prepare_data(req_info, reply_data, info); |
| rtnl_unlock(); |
| if (ret < 0) |
| goto err_cleanup; |
| ret = ops->reply_size(req_info, reply_data); |
| if (ret < 0) |
| goto err_cleanup; |
| reply_len = ret; |
| ret = -ENOMEM; |
| rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(), |
| req_info->dev, ops->reply_cmd, |
| ops->hdr_attr, info, &reply_payload); |
| if (!rskb) |
| goto err_cleanup; |
| hdr_len = rskb->len; |
| ret = ops->fill_reply(rskb, req_info, reply_data); |
| if (ret < 0) |
| goto err_msg; |
| WARN_ONCE(rskb->len - hdr_len > reply_len, |
| "ethnl cmd %d: calculated reply length %d, but consumed %d\n", |
| cmd, reply_len, rskb->len - hdr_len); |
| if (ops->cleanup_data) |
| ops->cleanup_data(reply_data); |
| |
| genlmsg_end(rskb, reply_payload); |
| netdev_put(req_info->dev, &req_info->dev_tracker); |
| kfree(reply_data); |
| kfree(req_info); |
| return genlmsg_reply(rskb, info); |
| |
| err_msg: |
| WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len); |
| nlmsg_free(rskb); |
| err_cleanup: |
| if (ops->cleanup_data) |
| ops->cleanup_data(reply_data); |
| err_dev: |
| netdev_put(req_info->dev, &req_info->dev_tracker); |
| kfree(reply_data); |
| kfree(req_info); |
| return ret; |
| } |
| |
| static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev, |
| const struct ethnl_dump_ctx *ctx, |
| struct netlink_callback *cb) |
| { |
| void *ehdr; |
| int ret; |
| |
| ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| ðtool_genl_family, NLM_F_MULTI, |
| ctx->ops->reply_cmd); |
| if (!ehdr) |
| return -EMSGSIZE; |
| |
| ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev); |
| rtnl_lock(); |
| ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL); |
| rtnl_unlock(); |
| if (ret < 0) |
| goto out; |
| ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr); |
| if (ret < 0) |
| goto out; |
| ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data); |
| |
| out: |
| if (ctx->ops->cleanup_data) |
| ctx->ops->cleanup_data(ctx->reply_data); |
| ctx->reply_data->dev = NULL; |
| if (ret < 0) |
| genlmsg_cancel(skb, ehdr); |
| else |
| genlmsg_end(skb, ehdr); |
| return ret; |
| } |
| |
| /* Default ->dumpit() handler for GET requests. Device iteration copied from |
| * rtnl_dump_ifinfo(); we have to be more careful about device hashtable |
| * persistence as we cannot guarantee to hold RTNL lock through the whole |
| * function as rtnetnlink does. |
| */ |
| static int ethnl_default_dumpit(struct sk_buff *skb, |
| struct netlink_callback *cb) |
| { |
| struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); |
| struct net *net = sock_net(skb->sk); |
| int s_idx = ctx->pos_idx; |
| int h, idx = 0; |
| int ret = 0; |
| |
| rtnl_lock(); |
| for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| struct hlist_head *head; |
| struct net_device *dev; |
| unsigned int seq; |
| |
| head = &net->dev_index_head[h]; |
| |
| restart_chain: |
| seq = net->dev_base_seq; |
| cb->seq = seq; |
| idx = 0; |
| hlist_for_each_entry(dev, head, index_hlist) { |
| if (idx < s_idx) |
| goto cont; |
| dev_hold(dev); |
| rtnl_unlock(); |
| |
| ret = ethnl_default_dump_one(skb, dev, ctx, cb); |
| dev_put(dev); |
| if (ret < 0) { |
| if (ret == -EOPNOTSUPP) |
| goto lock_and_cont; |
| if (likely(skb->len)) |
| ret = skb->len; |
| goto out; |
| } |
| lock_and_cont: |
| rtnl_lock(); |
| if (net->dev_base_seq != seq) { |
| s_idx = idx + 1; |
| goto restart_chain; |
| } |
| cont: |
| idx++; |
| } |
| |
| } |
| rtnl_unlock(); |
| |
| out: |
| ctx->pos_hash = h; |
| ctx->pos_idx = idx; |
| nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
| |
| return ret; |
| } |
| |
| /* generic ->start() handler for GET requests */ |
| static int ethnl_default_start(struct netlink_callback *cb) |
| { |
| const struct genl_dumpit_info *info = genl_dumpit_info(cb); |
| struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); |
| struct ethnl_reply_data *reply_data; |
| const struct ethnl_request_ops *ops; |
| struct ethnl_req_info *req_info; |
| struct genlmsghdr *ghdr; |
| int ret; |
| |
| BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); |
| |
| ghdr = nlmsg_data(cb->nlh); |
| ops = ethnl_default_requests[ghdr->cmd]; |
| if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd)) |
| return -EOPNOTSUPP; |
| req_info = kzalloc(ops->req_info_size, GFP_KERNEL); |
| if (!req_info) |
| return -ENOMEM; |
| reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); |
| if (!reply_data) { |
| ret = -ENOMEM; |
| goto free_req_info; |
| } |
| |
| ret = ethnl_default_parse(req_info, info->attrs, sock_net(cb->skb->sk), |
| ops, cb->extack, false); |
| if (req_info->dev) { |
| /* We ignore device specification in dump requests but as the |
| * same parser as for non-dump (doit) requests is used, it |
| * would take reference to the device if it finds one |
| */ |
| netdev_put(req_info->dev, &req_info->dev_tracker); |
| req_info->dev = NULL; |
| } |
| if (ret < 0) |
| goto free_reply_data; |
| |
| ctx->ops = ops; |
| ctx->req_info = req_info; |
| ctx->reply_data = reply_data; |
| ctx->pos_hash = 0; |
| ctx->pos_idx = 0; |
| |
| return 0; |
| |
| free_reply_data: |
| kfree(reply_data); |
| free_req_info: |
| kfree(req_info); |
| |
| return ret; |
| } |
| |
| /* default ->done() handler for GET requests */ |
| static int ethnl_default_done(struct netlink_callback *cb) |
| { |
| struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); |
| |
| kfree(ctx->reply_data); |
| kfree(ctx->req_info); |
| |
| return 0; |
| } |
| |
| static const struct ethnl_request_ops * |
| ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { |
| [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, |
| [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, |
| [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, |
| [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, |
| [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, |
| [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, |
| [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, |
| [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, |
| [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, |
| [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, |
| [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, |
| [ETHTOOL_MSG_FEC_NTF] = ðnl_fec_request_ops, |
| [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops, |
| }; |
| |
| /* default notification handler */ |
| static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, |
| const void *data) |
| { |
| struct ethnl_reply_data *reply_data; |
| const struct ethnl_request_ops *ops; |
| struct ethnl_req_info *req_info; |
| struct sk_buff *skb; |
| void *reply_payload; |
| int reply_len; |
| int ret; |
| |
| if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || |
| !ethnl_default_notify_ops[cmd], |
| "unexpected notification type %u\n", cmd)) |
| return; |
| ops = ethnl_default_notify_ops[cmd]; |
| req_info = kzalloc(ops->req_info_size, GFP_KERNEL); |
| if (!req_info) |
| return; |
| reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); |
| if (!reply_data) { |
| kfree(req_info); |
| return; |
| } |
| |
| req_info->dev = dev; |
| req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; |
| |
| ethnl_init_reply_data(reply_data, ops, dev); |
| ret = ops->prepare_data(req_info, reply_data, NULL); |
| if (ret < 0) |
| goto err_cleanup; |
| ret = ops->reply_size(req_info, reply_data); |
| if (ret < 0) |
| goto err_cleanup; |
| reply_len = ret + ethnl_reply_header_size(); |
| skb = genlmsg_new(reply_len, GFP_KERNEL); |
| if (!skb) |
| goto err_cleanup; |
| reply_payload = ethnl_bcastmsg_put(skb, cmd); |
| if (!reply_payload) |
| goto err_skb; |
| ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); |
| if (ret < 0) |
| goto err_msg; |
| ret = ops->fill_reply(skb, req_info, reply_data); |
| if (ret < 0) |
| goto err_msg; |
| if (ops->cleanup_data) |
| ops->cleanup_data(reply_data); |
| |
| genlmsg_end(skb, reply_payload); |
| kfree(reply_data); |
| kfree(req_info); |
| ethnl_multicast(skb, dev); |
| return; |
| |
| err_msg: |
| WARN_ONCE(ret == -EMSGSIZE, |
| "calculated message payload length (%d) not sufficient\n", |
| reply_len); |
| err_skb: |
| nlmsg_free(skb); |
| err_cleanup: |
| if (ops->cleanup_data) |
| ops->cleanup_data(reply_data); |
| kfree(reply_data); |
| kfree(req_info); |
| return; |
| } |
| |
| /* notifications */ |
| |
| typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, |
| const void *data); |
| |
| static const ethnl_notify_handler_t ethnl_notify_handlers[] = { |
| [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify, |
| [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify, |
| }; |
| |
| void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) |
| { |
| if (unlikely(!ethnl_ok)) |
| return; |
| ASSERT_RTNL(); |
| |
| if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && |
| ethnl_notify_handlers[cmd])) |
| ethnl_notify_handlers[cmd](dev, cmd, data); |
| else |
| WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", |
| cmd, netdev_name(dev)); |
| } |
| EXPORT_SYMBOL(ethtool_notify); |
| |
| static void ethnl_notify_features(struct netdev_notifier_info *info) |
| { |
| struct net_device *dev = netdev_notifier_info_to_dev(info); |
| |
| ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); |
| } |
| |
| static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, |
| void *ptr) |
| { |
| switch (event) { |
| case NETDEV_FEAT_CHANGE: |
| ethnl_notify_features(ptr); |
| break; |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block ethnl_netdev_notifier = { |
| .notifier_call = ethnl_netdev_event, |
| }; |
| |
| /* genetlink setup */ |
| |
| static const struct genl_ops ethtool_genl_ops[] = { |
| { |
| .cmd = ETHTOOL_MSG_STRSET_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_strset_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_LINKINFO_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_linkinfo_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_LINKINFO_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_linkinfo, |
| .policy = ethnl_linkinfo_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_LINKMODES_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_linkmodes_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_LINKMODES_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_linkmodes, |
| .policy = ethnl_linkmodes_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_LINKSTATE_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_linkstate_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_DEBUG_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_debug_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_DEBUG_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_debug, |
| .policy = ethnl_debug_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_WOL_GET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_wol_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_WOL_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_wol, |
| .policy = ethnl_wol_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_FEATURES_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_features_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_FEATURES_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_features, |
| .policy = ethnl_features_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_privflags_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_privflags, |
| .policy = ethnl_privflags_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_RINGS_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_rings_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_RINGS_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_rings, |
| .policy = ethnl_rings_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_CHANNELS_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_channels_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_CHANNELS_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_channels, |
| .policy = ethnl_channels_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_COALESCE_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_coalesce_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_COALESCE_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_coalesce, |
| .policy = ethnl_coalesce_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_PAUSE_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_pause_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_PAUSE_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_pause, |
| .policy = ethnl_pause_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_EEE_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_eee_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_EEE_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_eee, |
| .policy = ethnl_eee_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_TSINFO_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_tsinfo_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_CABLE_TEST_ACT, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_act_cable_test, |
| .policy = ethnl_cable_test_act_policy, |
| .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_act_cable_test_tdr, |
| .policy = ethnl_cable_test_tdr_act_policy, |
| .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET, |
| .doit = ethnl_tunnel_info_doit, |
| .start = ethnl_tunnel_info_start, |
| .dumpit = ethnl_tunnel_info_dumpit, |
| .policy = ethnl_tunnel_info_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_FEC_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_fec_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_FEC_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_fec, |
| .policy = ethnl_fec_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_module_eeprom_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_STATS_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_stats_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_phc_vclocks_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_MODULE_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_module_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_MODULE_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_module, |
| .policy = ethnl_module_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_PSE_GET, |
| .doit = ethnl_default_doit, |
| .start = ethnl_default_start, |
| .dumpit = ethnl_default_dumpit, |
| .done = ethnl_default_done, |
| .policy = ethnl_pse_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_PSE_SET, |
| .flags = GENL_UNS_ADMIN_PERM, |
| .doit = ethnl_set_pse, |
| .policy = ethnl_pse_set_policy, |
| .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1, |
| }, |
| { |
| .cmd = ETHTOOL_MSG_RSS_GET, |
| .doit = ethnl_default_doit, |
| .policy = ethnl_rss_get_policy, |
| .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1, |
| }, |
| }; |
| |
| static const struct genl_multicast_group ethtool_nl_mcgrps[] = { |
| [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, |
| }; |
| |
| static struct genl_family ethtool_genl_family __ro_after_init = { |
| .name = ETHTOOL_GENL_NAME, |
| .version = ETHTOOL_GENL_VERSION, |
| .netnsok = true, |
| .parallel_ops = true, |
| .ops = ethtool_genl_ops, |
| .n_ops = ARRAY_SIZE(ethtool_genl_ops), |
| .resv_start_op = ETHTOOL_MSG_MODULE_GET + 1, |
| .mcgrps = ethtool_nl_mcgrps, |
| .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), |
| }; |
| |
| /* module setup */ |
| |
| static int __init ethnl_init(void) |
| { |
| int ret; |
| |
| ret = genl_register_family(ðtool_genl_family); |
| if (WARN(ret < 0, "ethtool: genetlink family registration failed")) |
| return ret; |
| ethnl_ok = true; |
| |
| ret = register_netdevice_notifier(ðnl_netdev_notifier); |
| WARN(ret < 0, "ethtool: net device notifier registration failed"); |
| return ret; |
| } |
| |
| subsys_initcall(ethnl_init); |