1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include "netlink.h" 4 #include "common.h" 5 #include "bitset.h" 6 7 struct debug_req_info { 8 struct ethnl_req_info base; 9 }; 10 11 struct debug_reply_data { 12 struct ethnl_reply_data base; 13 u32 msg_mask; 14 }; 15 16 #define DEBUG_REPDATA(__reply_base) \ 17 container_of(__reply_base, struct debug_reply_data, base) 18 19 const struct nla_policy ethnl_debug_get_policy[] = { 20 [ETHTOOL_A_DEBUG_HEADER] = 21 NLA_POLICY_NESTED(ethnl_header_policy), 22 }; 23 debug_prepare_data(const struct ethnl_req_info * req_base,struct ethnl_reply_data * reply_base,struct genl_info * info)24 static int debug_prepare_data(const struct ethnl_req_info *req_base, 25 struct ethnl_reply_data *reply_base, 26 struct genl_info *info) 27 { 28 struct debug_reply_data *data = DEBUG_REPDATA(reply_base); 29 struct net_device *dev = reply_base->dev; 30 int ret; 31 32 if (!dev->ethtool_ops->get_msglevel) 33 return -EOPNOTSUPP; 34 35 ret = ethnl_ops_begin(dev); 36 if (ret < 0) 37 return ret; 38 data->msg_mask = dev->ethtool_ops->get_msglevel(dev); 39 ethnl_ops_complete(dev); 40 41 return 0; 42 } 43 debug_reply_size(const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)44 static int debug_reply_size(const struct ethnl_req_info *req_base, 45 const struct ethnl_reply_data *reply_base) 46 { 47 const struct debug_reply_data *data = DEBUG_REPDATA(reply_base); 48 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; 49 50 return ethnl_bitset32_size(&data->msg_mask, NULL, NETIF_MSG_CLASS_COUNT, 51 netif_msg_class_names, compact); 52 } 53 debug_fill_reply(struct sk_buff * skb,const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)54 static int debug_fill_reply(struct sk_buff *skb, 55 const struct ethnl_req_info *req_base, 56 const struct ethnl_reply_data *reply_base) 57 { 58 const struct debug_reply_data *data = DEBUG_REPDATA(reply_base); 59 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; 60 61 return ethnl_put_bitset32(skb, ETHTOOL_A_DEBUG_MSGMASK, &data->msg_mask, 62 NULL, NETIF_MSG_CLASS_COUNT, 63 netif_msg_class_names, compact); 64 } 65 66 const struct ethnl_request_ops ethnl_debug_request_ops = { 67 .request_cmd = ETHTOOL_MSG_DEBUG_GET, 68 .reply_cmd = ETHTOOL_MSG_DEBUG_GET_REPLY, 69 .hdr_attr = ETHTOOL_A_DEBUG_HEADER, 70 .req_info_size = sizeof(struct debug_req_info), 71 .reply_data_size = sizeof(struct debug_reply_data), 72 73 .prepare_data = debug_prepare_data, 74 .reply_size = debug_reply_size, 75 .fill_reply = debug_fill_reply, 76 }; 77 78 /* DEBUG_SET */ 79 80 const struct nla_policy ethnl_debug_set_policy[] = { 81 [ETHTOOL_A_DEBUG_HEADER] = 82 NLA_POLICY_NESTED(ethnl_header_policy), 83 [ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_NESTED }, 84 }; 85 ethnl_set_debug(struct sk_buff * skb,struct genl_info * info)86 int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info) 87 { 88 struct ethnl_req_info req_info = {}; 89 struct nlattr **tb = info->attrs; 90 struct net_device *dev; 91 bool mod = false; 92 u32 msg_mask; 93 int ret; 94 95 ret = ethnl_parse_header_dev_get(&req_info, 96 tb[ETHTOOL_A_DEBUG_HEADER], 97 genl_info_net(info), info->extack, 98 true); 99 if (ret < 0) 100 return ret; 101 dev = req_info.dev; 102 ret = -EOPNOTSUPP; 103 if (!dev->ethtool_ops->get_msglevel || !dev->ethtool_ops->set_msglevel) 104 goto out_dev; 105 106 rtnl_lock(); 107 ret = ethnl_ops_begin(dev); 108 if (ret < 0) 109 goto out_rtnl; 110 111 msg_mask = dev->ethtool_ops->get_msglevel(dev); 112 ret = ethnl_update_bitset32(&msg_mask, NETIF_MSG_CLASS_COUNT, 113 tb[ETHTOOL_A_DEBUG_MSGMASK], 114 netif_msg_class_names, info->extack, &mod); 115 if (ret < 0 || !mod) 116 goto out_ops; 117 118 dev->ethtool_ops->set_msglevel(dev, msg_mask); 119 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); 120 121 out_ops: 122 ethnl_ops_complete(dev); 123 out_rtnl: 124 rtnl_unlock(); 125 out_dev: 126 dev_put(dev); 127 return ret; 128 } 129