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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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4f30974feb
Wire up policies for get commands in struct nla_policy of the ethtool family. Make use of genetlink code attr validation and parsing, as well as allow dumping policies to user space. For every ETHTOOL_MSG_*_GET: - add 'ethnl_' prefix to policy name - add extern declaration in net/ethtool/netlink.h - wire up the policy & attr in ethtool_genl_ops[]. - remove .request_policy and .max_attr from ethnl_request_ops. Obviously core only records the first "layer" of parsed attrs so we still need to parse the sub-attrs of the nested header attribute. v2: - merge of patches 1 and 2 from v1 - remove stray empty lines in ops - also remove .max_attr Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include "netlink.h"
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#include "common.h"
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#include "bitset.h"
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struct debug_req_info {
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struct ethnl_req_info base;
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};
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struct debug_reply_data {
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struct ethnl_reply_data base;
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u32 msg_mask;
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};
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#define DEBUG_REPDATA(__reply_base) \
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container_of(__reply_base, struct debug_reply_data, base)
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const struct nla_policy ethnl_debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
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[ETHTOOL_A_DEBUG_UNSPEC] = { .type = NLA_REJECT },
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[ETHTOOL_A_DEBUG_HEADER] = { .type = NLA_NESTED },
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[ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_REJECT },
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};
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static int debug_prepare_data(const struct ethnl_req_info *req_base,
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struct ethnl_reply_data *reply_base,
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struct genl_info *info)
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{
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struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
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struct net_device *dev = reply_base->dev;
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int ret;
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if (!dev->ethtool_ops->get_msglevel)
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return -EOPNOTSUPP;
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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return ret;
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data->msg_mask = dev->ethtool_ops->get_msglevel(dev);
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ethnl_ops_complete(dev);
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return 0;
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}
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static int debug_reply_size(const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
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bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
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return ethnl_bitset32_size(&data->msg_mask, NULL, NETIF_MSG_CLASS_COUNT,
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netif_msg_class_names, compact);
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}
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static int debug_fill_reply(struct sk_buff *skb,
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const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
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bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
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return ethnl_put_bitset32(skb, ETHTOOL_A_DEBUG_MSGMASK, &data->msg_mask,
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NULL, NETIF_MSG_CLASS_COUNT,
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netif_msg_class_names, compact);
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}
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const struct ethnl_request_ops ethnl_debug_request_ops = {
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.request_cmd = ETHTOOL_MSG_DEBUG_GET,
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.reply_cmd = ETHTOOL_MSG_DEBUG_GET_REPLY,
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.hdr_attr = ETHTOOL_A_DEBUG_HEADER,
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.req_info_size = sizeof(struct debug_req_info),
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.reply_data_size = sizeof(struct debug_reply_data),
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.prepare_data = debug_prepare_data,
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.reply_size = debug_reply_size,
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.fill_reply = debug_fill_reply,
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};
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/* DEBUG_SET */
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static const struct nla_policy
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debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
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[ETHTOOL_A_DEBUG_UNSPEC] = { .type = NLA_REJECT },
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[ETHTOOL_A_DEBUG_HEADER] = { .type = NLA_NESTED },
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[ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_NESTED },
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};
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int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info)
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{
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struct nlattr *tb[ETHTOOL_A_DEBUG_MAX + 1];
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struct ethnl_req_info req_info = {};
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struct net_device *dev;
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bool mod = false;
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u32 msg_mask;
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int ret;
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ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
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ETHTOOL_A_DEBUG_MAX, debug_set_policy,
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info->extack);
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if (ret < 0)
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return ret;
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ret = ethnl_parse_header_dev_get(&req_info,
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tb[ETHTOOL_A_DEBUG_HEADER],
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genl_info_net(info), info->extack,
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true);
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if (ret < 0)
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return ret;
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dev = req_info.dev;
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ret = -EOPNOTSUPP;
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if (!dev->ethtool_ops->get_msglevel || !dev->ethtool_ops->set_msglevel)
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goto out_dev;
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rtnl_lock();
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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goto out_rtnl;
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msg_mask = dev->ethtool_ops->get_msglevel(dev);
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ret = ethnl_update_bitset32(&msg_mask, NETIF_MSG_CLASS_COUNT,
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tb[ETHTOOL_A_DEBUG_MSGMASK],
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netif_msg_class_names, info->extack, &mod);
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if (ret < 0 || !mod)
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goto out_ops;
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dev->ethtool_ops->set_msglevel(dev, msg_mask);
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ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
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out_ops:
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ethnl_ops_complete(dev);
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out_rtnl:
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rtnl_unlock();
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out_dev:
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dev_put(dev);
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return ret;
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}
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