2019-12-27 14:55:18 +00:00
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// SPDX-License-Identifier: GPL-2.0-only
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2019-12-27 14:55:23 +00:00
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#include <net/sock.h>
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2019-12-27 14:55:18 +00:00
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#include <linux/ethtool_netlink.h>
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#include "netlink.h"
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2019-12-27 14:55:23 +00:00
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static struct genl_family ethtool_genl_family;
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2019-12-27 14:55:33 +00:00
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static bool ethnl_ok __read_mostly;
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2019-12-27 14:55:58 +00:00
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static u32 ethnl_bcast_seq;
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2019-12-27 14:55:33 +00:00
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2019-12-27 14:55:23 +00:00
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static const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_MAX + 1] = {
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[ETHTOOL_A_HEADER_UNSPEC] = { .type = NLA_REJECT },
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[ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 },
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[ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING,
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.len = ALTIFNAMSIZ - 1 },
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[ETHTOOL_A_HEADER_FLAGS] = { .type = NLA_U32 },
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};
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/**
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2020-03-12 20:07:38 +00:00
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* ethnl_parse_header_dev_get() - parse request header
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2019-12-27 14:55:23 +00:00
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* @req_info: structure to put results into
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* @header: nest attribute with request header
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* @net: request netns
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* @extack: netlink extack for error reporting
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* @require_dev: fail if no device identified in header
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*
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* Parse request header in nested attribute @nest and puts results into
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* the structure pointed to by @req_info. Extack from @info is used for error
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* reporting. If req_info->dev is not null on return, reference to it has
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* been taken. If error is returned, *req_info is null initialized and no
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* reference is held.
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*
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* Return: 0 on success or negative error code
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*/
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2020-03-12 20:07:38 +00:00
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int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
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const struct nlattr *header, struct net *net,
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struct netlink_ext_ack *extack, bool require_dev)
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2019-12-27 14:55:23 +00:00
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{
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struct nlattr *tb[ETHTOOL_A_HEADER_MAX + 1];
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const struct nlattr *devname_attr;
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struct net_device *dev = NULL;
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2020-03-15 17:17:53 +00:00
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u32 flags = 0;
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2019-12-27 14:55:23 +00:00
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int ret;
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if (!header) {
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NL_SET_ERR_MSG(extack, "request header missing");
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return -EINVAL;
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}
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ret = nla_parse_nested(tb, ETHTOOL_A_HEADER_MAX, header,
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ethnl_header_policy, extack);
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if (ret < 0)
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return ret;
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2020-03-15 17:17:53 +00:00
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if (tb[ETHTOOL_A_HEADER_FLAGS]) {
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flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
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if (flags & ~ETHTOOL_FLAG_ALL) {
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NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_HEADER_FLAGS],
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"unrecognized request flags");
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nl_set_extack_cookie_u32(extack, ETHTOOL_FLAG_ALL);
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return -EOPNOTSUPP;
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}
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}
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2019-12-27 14:55:23 +00:00
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2020-03-15 17:17:53 +00:00
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devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
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2019-12-27 14:55:23 +00:00
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if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
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u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
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dev = dev_get_by_index(net, ifindex);
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if (!dev) {
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NL_SET_ERR_MSG_ATTR(extack,
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tb[ETHTOOL_A_HEADER_DEV_INDEX],
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"no device matches ifindex");
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return -ENODEV;
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}
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/* if both ifindex and ifname are passed, they must match */
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if (devname_attr &&
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strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
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dev_put(dev);
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NL_SET_ERR_MSG_ATTR(extack, header,
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"ifindex and name do not match");
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return -ENODEV;
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}
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} else if (devname_attr) {
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dev = dev_get_by_name(net, nla_data(devname_attr));
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if (!dev) {
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NL_SET_ERR_MSG_ATTR(extack, devname_attr,
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"no device matches name");
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return -ENODEV;
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}
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} else if (require_dev) {
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NL_SET_ERR_MSG_ATTR(extack, header,
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"neither ifindex nor name specified");
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return -EINVAL;
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}
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if (dev && !netif_device_present(dev)) {
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dev_put(dev);
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NL_SET_ERR_MSG(extack, "device not present");
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return -ENODEV;
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}
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req_info->dev = dev;
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2020-03-15 17:17:53 +00:00
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req_info->flags = flags;
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2019-12-27 14:55:23 +00:00
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return 0;
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}
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/**
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* ethnl_fill_reply_header() - Put common header into a reply message
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* @skb: skb with the message
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* @dev: network device to describe in header
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* @attrtype: attribute type to use for the nest
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*
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* Create a nested attribute with attributes describing given network device.
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*
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* Return: 0 on success, error value (-EMSGSIZE only) on error
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*/
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int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
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u16 attrtype)
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{
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struct nlattr *nest;
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if (!dev)
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return 0;
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nest = nla_nest_start(skb, attrtype);
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if (!nest)
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return -EMSGSIZE;
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if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
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nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
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goto nla_put_failure;
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/* If more attributes are put into reply header, ethnl_header_size()
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* must be updated to account for them.
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*/
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nla_nest_end(skb, nest);
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return 0;
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nla_put_failure:
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nla_nest_cancel(skb, nest);
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return -EMSGSIZE;
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}
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/**
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* ethnl_reply_init() - Create skb for a reply and fill device identification
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2020-01-26 22:11:01 +00:00
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* @payload: payload length (without netlink and genetlink header)
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* @dev: device the reply is about (may be null)
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* @cmd: ETHTOOL_MSG_* message type for reply
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* @hdr_attrtype: attribute type for common header
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* @info: genetlink info of the received packet we respond to
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* @ehdrp: place to store payload pointer returned by genlmsg_new()
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2019-12-27 14:55:23 +00:00
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*
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* Return: pointer to allocated skb on success, NULL on error
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*/
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struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
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u16 hdr_attrtype, struct genl_info *info,
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void **ehdrp)
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{
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struct sk_buff *skb;
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skb = genlmsg_new(payload, GFP_KERNEL);
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if (!skb)
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goto err;
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*ehdrp = genlmsg_put_reply(skb, info, ðtool_genl_family, 0, cmd);
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if (!*ehdrp)
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goto err_free;
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if (dev) {
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int ret;
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ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
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if (ret < 0)
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goto err_free;
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}
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return skb;
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err_free:
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nlmsg_free(skb);
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err:
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if (info)
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GENL_SET_ERR_MSG(info, "failed to setup reply message");
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return NULL;
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}
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2019-12-27 14:55:58 +00:00
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static void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
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{
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return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0,
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cmd);
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}
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static int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
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{
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return genlmsg_multicast_netns(ðtool_genl_family, dev_net(dev), skb,
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0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
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}
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2019-12-27 14:55:38 +00:00
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/* GET request helpers */
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/**
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* struct ethnl_dump_ctx - context structure for generic dumpit() callback
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2020-01-26 22:11:01 +00:00
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* @ops: request ops of currently processed message type
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* @req_info: parsed request header of processed request
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* @reply_data: data needed to compose the reply
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* @pos_hash: saved iteration position - hashbucket
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* @pos_idx: saved iteration position - index
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2019-12-27 14:55:38 +00:00
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*
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* These parameters are kept in struct netlink_callback as context preserved
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* between iterations. They are initialized by ethnl_default_start() and used
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* in ethnl_default_dumpit() and ethnl_default_done().
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*/
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struct ethnl_dump_ctx {
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const struct ethnl_request_ops *ops;
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struct ethnl_req_info *req_info;
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struct ethnl_reply_data *reply_data;
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int pos_hash;
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int pos_idx;
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};
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static const struct ethnl_request_ops *
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ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
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2019-12-27 14:55:43 +00:00
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[ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops,
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2019-12-27 14:55:48 +00:00
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[ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops,
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2019-12-27 14:56:08 +00:00
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[ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops,
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2019-12-27 14:56:23 +00:00
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[ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops,
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2020-01-26 22:11:04 +00:00
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[ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops,
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2020-01-26 22:11:13 +00:00
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[ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops,
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2020-03-12 20:07:48 +00:00
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[ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
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2020-03-12 20:08:08 +00:00
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[ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops,
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2020-03-12 20:08:23 +00:00
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[ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops,
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2020-03-12 20:08:38 +00:00
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[ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops,
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2020-03-27 23:01:08 +00:00
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[ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops,
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2020-03-27 23:01:23 +00:00
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[ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops,
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2020-03-27 23:01:38 +00:00
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[ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops,
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2020-03-27 23:01:58 +00:00
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[ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops,
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2019-12-27 14:55:38 +00:00
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};
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static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
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{
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return (struct ethnl_dump_ctx *)cb->ctx;
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}
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/**
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* ethnl_default_parse() - Parse request message
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* @req_info: pointer to structure to put data into
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* @nlhdr: pointer to request message header
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* @net: request netns
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* @request_ops: struct request_ops for request type
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* @extack: netlink extack for error reporting
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* @require_dev: fail if no device identified in header
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*
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* Parse universal request header and call request specific ->parse_request()
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* callback (if defined) to parse the rest of the message.
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*
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* Return: 0 on success or negative error code
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*/
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static int ethnl_default_parse(struct ethnl_req_info *req_info,
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const struct nlmsghdr *nlhdr, struct net *net,
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const struct ethnl_request_ops *request_ops,
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struct netlink_ext_ack *extack, bool require_dev)
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{
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struct nlattr **tb;
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int ret;
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tb = kmalloc_array(request_ops->max_attr + 1, sizeof(tb[0]),
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GFP_KERNEL);
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if (!tb)
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return -ENOMEM;
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ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, request_ops->max_attr,
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request_ops->request_policy, extack);
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if (ret < 0)
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goto out;
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2020-03-12 20:07:38 +00:00
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ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
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net, extack, require_dev);
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2019-12-27 14:55:38 +00:00
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if (ret < 0)
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goto out;
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if (request_ops->parse_request) {
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ret = request_ops->parse_request(req_info, tb, extack);
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if (ret < 0)
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goto out;
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}
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ret = 0;
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out:
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kfree(tb);
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return ret;
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}
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/**
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* ethnl_init_reply_data() - Initialize reply data for GET request
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2020-01-26 22:11:01 +00:00
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* @reply_data: pointer to embedded struct ethnl_reply_data
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* @ops: instance of struct ethnl_request_ops describing the layout
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* @dev: network device to initialize the reply for
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2019-12-27 14:55:38 +00:00
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*
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* Fills the reply data part with zeros and sets the dev member. Must be called
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* before calling the ->fill_reply() callback (for each iteration when handling
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* dump requests).
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*/
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static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
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const struct ethnl_request_ops *ops,
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struct net_device *dev)
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{
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memset(reply_data, 0, ops->reply_data_size);
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reply_data->dev = dev;
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}
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/* default ->doit() handler for GET type requests */
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static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
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{
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struct ethnl_reply_data *reply_data = NULL;
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struct ethnl_req_info *req_info = NULL;
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const u8 cmd = info->genlhdr->cmd;
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const struct ethnl_request_ops *ops;
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struct sk_buff *rskb;
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void *reply_payload;
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int reply_len;
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int ret;
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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->nlhdr, 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;
|
2020-01-08 05:41:25 +00:00
|
|
|
ret = ops->reply_size(req_info, reply_data);
|
2019-12-27 14:55:38 +00:00
|
|
|
if (ret < 0)
|
|
|
|
goto err_cleanup;
|
2020-01-08 05:41:25 +00:00
|
|
|
reply_len = ret;
|
2019-12-27 14:55:38 +00:00
|
|
|
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)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
void *ehdr;
|
|
|
|
|
|
|
|
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();
|
|
|
|
|
|
|
|
ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
|
|
|
|
cb->nlh->nlmsg_seq,
|
|
|
|
ðtool_genl_family, 0,
|
|
|
|
ctx->ops->reply_cmd);
|
|
|
|
if (!ehdr) {
|
|
|
|
dev_put(dev);
|
|
|
|
ret = -EMSGSIZE;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
ret = ethnl_default_dump_one(skb, dev, ctx);
|
|
|
|
dev_put(dev);
|
|
|
|
if (ret < 0) {
|
|
|
|
genlmsg_cancel(skb, ehdr);
|
|
|
|
if (ret == -EOPNOTSUPP)
|
|
|
|
goto lock_and_cont;
|
|
|
|
if (likely(skb->len))
|
|
|
|
ret = skb->len;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
genlmsg_end(skb, ehdr);
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
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) {
|
2020-01-08 05:39:48 +00:00
|
|
|
ret = -ENOMEM;
|
|
|
|
goto free_req_info;
|
2019-12-27 14:55:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = ethnl_default_parse(req_info, cb->nlh, 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)
|
2020-01-08 05:39:48 +00:00
|
|
|
goto free_reply_data;
|
2019-12-27 14:55:38 +00:00
|
|
|
|
|
|
|
ctx->ops = ops;
|
|
|
|
ctx->req_info = req_info;
|
|
|
|
ctx->reply_data = reply_data;
|
|
|
|
ctx->pos_hash = 0;
|
|
|
|
ctx->pos_idx = 0;
|
|
|
|
|
|
|
|
return 0;
|
2020-01-08 05:39:48 +00:00
|
|
|
|
|
|
|
free_reply_data:
|
|
|
|
kfree(reply_data);
|
|
|
|
free_req_info:
|
|
|
|
kfree(req_info);
|
|
|
|
|
|
|
|
return ret;
|
2019-12-27 14:55:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* 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;
|
|
|
|
}
|
|
|
|
|
2019-12-27 14:55:58 +00:00
|
|
|
static const struct ethnl_request_ops *
|
|
|
|
ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
|
2019-12-27 14:56:03 +00:00
|
|
|
[ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops,
|
2019-12-27 14:56:18 +00:00
|
|
|
[ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops,
|
2020-01-26 22:11:10 +00:00
|
|
|
[ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops,
|
2020-01-26 22:11:19 +00:00
|
|
|
[ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops,
|
2020-03-12 20:08:03 +00:00
|
|
|
[ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops,
|
2020-03-12 20:08:18 +00:00
|
|
|
[ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops,
|
2020-03-12 20:08:33 +00:00
|
|
|
[ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops,
|
2020-03-12 20:08:48 +00:00
|
|
|
[ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops,
|
2020-03-27 23:01:18 +00:00
|
|
|
[ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops,
|
2020-03-27 23:01:33 +00:00
|
|
|
[ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops,
|
2020-03-27 23:01:48 +00:00
|
|
|
[ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops,
|
2019-12-27 14:55:58 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* 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;
|
2020-01-08 05:41:25 +00:00
|
|
|
ret = ops->reply_size(req_info, reply_data);
|
2019-12-27 14:55:58 +00:00
|
|
|
if (ret < 0)
|
|
|
|
goto err_cleanup;
|
2020-01-08 05:41:25 +00:00
|
|
|
reply_len = ret;
|
2019-12-27 14:55:58 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2019-12-27 14:55:33 +00:00
|
|
|
/* 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[] = {
|
2019-12-27 14:56:03 +00:00
|
|
|
[ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify,
|
2019-12-27 14:56:18 +00:00
|
|
|
[ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify,
|
2020-01-26 22:11:10 +00:00
|
|
|
[ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify,
|
2020-01-26 22:11:19 +00:00
|
|
|
[ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify,
|
2020-03-12 20:08:03 +00:00
|
|
|
[ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
|
2020-03-12 20:08:18 +00:00
|
|
|
[ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify,
|
2020-03-12 20:08:33 +00:00
|
|
|
[ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify,
|
2020-03-12 20:08:48 +00:00
|
|
|
[ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify,
|
2020-03-27 23:01:18 +00:00
|
|
|
[ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify,
|
2020-03-27 23:01:33 +00:00
|
|
|
[ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify,
|
2020-03-27 23:01:48 +00:00
|
|
|
[ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify,
|
2019-12-27 14:55:33 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
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);
|
|
|
|
|
2020-03-12 20:08:03 +00:00
|
|
|
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,
|
|
|
|
};
|
|
|
|
|
2019-12-27 14:55:18 +00:00
|
|
|
/* genetlink setup */
|
|
|
|
|
|
|
|
static const struct genl_ops ethtool_genl_ops[] = {
|
2019-12-27 14:55:43 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_STRSET_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2019-12-27 14:55:48 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_LINKINFO_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2019-12-27 14:55:53 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_LINKINFO_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_linkinfo,
|
|
|
|
},
|
2019-12-27 14:56:08 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_LINKMODES_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2019-12-27 14:56:13 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_LINKMODES_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_linkmodes,
|
|
|
|
},
|
2019-12-27 14:56:23 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_LINKSTATE_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-01-26 22:11:04 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_DEBUG_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-01-26 22:11:07 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_DEBUG_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_debug,
|
|
|
|
},
|
2020-01-26 22:11:13 +00:00
|
|
|
{
|
|
|
|
.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,
|
|
|
|
},
|
2020-01-26 22:11:16 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_WOL_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_wol,
|
|
|
|
},
|
2020-03-12 20:07:48 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_FEATURES_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-03-12 20:07:58 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_FEATURES_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_features,
|
|
|
|
},
|
2020-03-12 20:08:08 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-03-12 20:08:13 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_PRIVFLAGS_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_privflags,
|
|
|
|
},
|
2020-03-12 20:08:23 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_RINGS_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-03-12 20:08:28 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_RINGS_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_rings,
|
|
|
|
},
|
2020-03-12 20:08:38 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_CHANNELS_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-03-12 20:08:43 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_CHANNELS_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_channels,
|
|
|
|
},
|
2020-03-27 23:01:08 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_COALESCE_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-03-27 23:01:13 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_COALESCE_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_coalesce,
|
|
|
|
},
|
2020-03-27 23:01:23 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_PAUSE_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-03-27 23:01:28 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_PAUSE_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_pause,
|
|
|
|
},
|
2020-03-27 23:01:38 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_EEE_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2020-03-27 23:01:43 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_EEE_SET,
|
|
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
|
|
.doit = ethnl_set_eee,
|
|
|
|
},
|
2020-03-27 23:01:58 +00:00
|
|
|
{
|
|
|
|
.cmd = ETHTOOL_MSG_TSINFO_GET,
|
|
|
|
.doit = ethnl_default_doit,
|
|
|
|
.start = ethnl_default_start,
|
|
|
|
.dumpit = ethnl_default_dumpit,
|
|
|
|
.done = ethnl_default_done,
|
|
|
|
},
|
2019-12-27 14:55:18 +00:00
|
|
|
};
|
|
|
|
|
2019-12-27 14:55:33 +00:00
|
|
|
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
|
|
|
|
[ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
|
|
|
|
};
|
|
|
|
|
2019-12-27 14:55:18 +00:00
|
|
|
static struct genl_family ethtool_genl_family = {
|
|
|
|
.name = ETHTOOL_GENL_NAME,
|
|
|
|
.version = ETHTOOL_GENL_VERSION,
|
|
|
|
.netnsok = true,
|
|
|
|
.parallel_ops = true,
|
|
|
|
.ops = ethtool_genl_ops,
|
|
|
|
.n_ops = ARRAY_SIZE(ethtool_genl_ops),
|
2019-12-27 14:55:33 +00:00
|
|
|
.mcgrps = ethtool_nl_mcgrps,
|
|
|
|
.n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps),
|
2019-12-27 14:55:18 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* 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;
|
2019-12-27 14:55:33 +00:00
|
|
|
ethnl_ok = true;
|
2019-12-27 14:55:18 +00:00
|
|
|
|
2020-03-12 20:08:03 +00:00
|
|
|
ret = register_netdevice_notifier(ðnl_netdev_notifier);
|
|
|
|
WARN(ret < 0, "ethtool: net device notifier registration failed");
|
|
|
|
return ret;
|
2019-12-27 14:55:18 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
subsys_initcall(ethnl_init);
|