Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
new file mode 100644
index 0000000..25a5508
--- /dev/null
+++ b/net/ethtool/netlink.c
@@ -0,0 +1,949 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <net/sock.h>
+#include <linux/ethtool_netlink.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),
+};
+
+/**
+ * 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;
+ }
+
+ if (dev && !netif_device_present(dev)) {
+ dev_put(dev);
+ NL_SET_ERR_MSG(extack, "device not present");
+ return -ENODEV;
+ }
+
+ req_info->dev = dev;
+ 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_TSINFO_GET] = ðnl_tsinfo_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;
+ struct sk_buff *rskb;
+ void *reply_payload;
+ int reply_len;
+ int ret;
+
+ ops = ethnl_default_requests[cmd];
+ if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", 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) {
+ 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 + ethnl_reply_header_size();
+ ret = -ENOMEM;
+ rskb = ethnl_reply_init(reply_len, req_info->dev, ops->reply_cmd,
+ ops->hdr_attr, info, &reply_payload);
+ if (!rskb)
+ goto err_cleanup;
+ ret = ops->fill_reply(rskb, req_info, reply_data);
+ if (ret < 0)
+ goto err_msg;
+ if (ops->cleanup_data)
+ ops->cleanup_data(reply_data);
+
+ genlmsg_end(rskb, reply_payload);
+ if (req_info->dev)
+ dev_put(req_info->dev);
+ 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:
+ if (req_info->dev)
+ dev_put(req_info->dev);
+ 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
+ */
+ dev_put(req_info->dev);
+ 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,
+};
+
+/* 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();
+ ret = -ENOMEM;
+ 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,
+};
+
+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,
+ },
+};
+
+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),
+ .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);