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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
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#include "common.h"#include "netlink.h"
struct pause_req_info { struct ethnl_req_info base; enum ethtool_mac_stats_src src;};
#define PAUSE_REQINFO(__req_base) \ container_of(__req_base, struct pause_req_info, base)
struct pause_reply_data { struct ethnl_reply_data base; struct ethtool_pauseparam pauseparam; struct ethtool_pause_stats pausestat;};
#define PAUSE_REPDATA(__reply_base) \ container_of(__reply_base, struct pause_reply_data, base)
const struct nla_policy ethnl_pause_get_policy[] = { [ETHTOOL_A_PAUSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats), [ETHTOOL_A_PAUSE_STATS_SRC] = NLA_POLICY_MAX(NLA_U32, ETHTOOL_MAC_STATS_SRC_PMAC),};
static int pause_parse_request(struct ethnl_req_info *req_base, const struct genl_info *info, struct nlattr **tb, struct netlink_ext_ack *extack){ enum ethtool_mac_stats_src src = ETHTOOL_MAC_STATS_SRC_AGGREGATE; struct pause_req_info *req_info = PAUSE_REQINFO(req_base);
if (tb[ETHTOOL_A_PAUSE_STATS_SRC]) { if (!(req_base->flags & ETHTOOL_FLAG_STATS)) { NL_SET_ERR_MSG_MOD(extack, "ETHTOOL_FLAG_STATS must be set when requesting a source of stats"); return -EINVAL; }
src = nla_get_u32(tb[ETHTOOL_A_PAUSE_STATS_SRC]); }
req_info->src = src;
return 0;}
static int pause_prepare_data(const struct ethnl_req_info *req_base, struct ethnl_reply_data *reply_base, const struct genl_info *info){ const struct pause_req_info *req_info = PAUSE_REQINFO(req_base); struct pause_reply_data *data = PAUSE_REPDATA(reply_base); enum ethtool_mac_stats_src src = req_info->src; struct net_device *dev = reply_base->dev; int ret;
if (!dev->ethtool_ops->get_pauseparam) return -EOPNOTSUPP;
ethtool_stats_init((u64 *)&data->pausestat, sizeof(data->pausestat) / 8); data->pausestat.src = src;
ret = ethnl_ops_begin(dev); if (ret < 0) return ret;
if ((src == ETHTOOL_MAC_STATS_SRC_EMAC || src == ETHTOOL_MAC_STATS_SRC_PMAC) && !__ethtool_dev_mm_supported(dev)) { NL_SET_ERR_MSG_MOD(info->extack, "Device does not support MAC merge layer"); ethnl_ops_complete(dev); return -EOPNOTSUPP; }
dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam); if (req_base->flags & ETHTOOL_FLAG_STATS && dev->ethtool_ops->get_pause_stats) dev->ethtool_ops->get_pause_stats(dev, &data->pausestat);
ethnl_ops_complete(dev);
return 0;}
static int pause_reply_size(const struct ethnl_req_info *req_base, const struct ethnl_reply_data *reply_base){ int n = nla_total_size(sizeof(u8)) + /* _PAUSE_AUTONEG */ nla_total_size(sizeof(u8)) + /* _PAUSE_RX */ nla_total_size(sizeof(u8)); /* _PAUSE_TX */
if (req_base->flags & ETHTOOL_FLAG_STATS) n += nla_total_size(0) + /* _PAUSE_STATS */ nla_total_size(sizeof(u32)) + /* _PAUSE_STATS_SRC */ nla_total_size_64bit(sizeof(u64)) * ETHTOOL_PAUSE_STAT_CNT; return n;}
static int ethtool_put_stat(struct sk_buff *skb, u64 val, u16 attrtype, u16 padtype){ if (val == ETHTOOL_STAT_NOT_SET) return 0; if (nla_put_u64_64bit(skb, attrtype, val, padtype)) return -EMSGSIZE;
return 0;}
static int pause_put_stats(struct sk_buff *skb, const struct ethtool_pause_stats *pause_stats){ const u16 pad = ETHTOOL_A_PAUSE_STAT_PAD; struct nlattr *nest;
if (nla_put_u32(skb, ETHTOOL_A_PAUSE_STATS_SRC, pause_stats->src)) return -EMSGSIZE;
nest = nla_nest_start(skb, ETHTOOL_A_PAUSE_STATS); if (!nest) return -EMSGSIZE;
if (ethtool_put_stat(skb, pause_stats->tx_pause_frames, ETHTOOL_A_PAUSE_STAT_TX_FRAMES, pad) || ethtool_put_stat(skb, pause_stats->rx_pause_frames, ETHTOOL_A_PAUSE_STAT_RX_FRAMES, pad) || ethtool_put_stat(skb, pause_stats->tx_pause_storm_events, ETHTOOL_A_PAUSE_STAT_TX_PAUSE_STORM_EVENTS, pad)) goto err_cancel;
nla_nest_end(skb, nest); return 0;
err_cancel: nla_nest_cancel(skb, nest); return -EMSGSIZE;}
static int pause_fill_reply(struct sk_buff *skb, const struct ethnl_req_info *req_base, const struct ethnl_reply_data *reply_base){ const struct pause_reply_data *data = PAUSE_REPDATA(reply_base); const struct ethtool_pauseparam *pauseparam = &data->pauseparam;
if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) || nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) || nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause)) return -EMSGSIZE;
if (req_base->flags & ETHTOOL_FLAG_STATS && pause_put_stats(skb, &data->pausestat)) return -EMSGSIZE;
return 0;}
/* PAUSE_SET */
const struct nla_policy ethnl_pause_set_policy[] = { [ETHTOOL_A_PAUSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), [ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_U8 }, [ETHTOOL_A_PAUSE_RX] = { .type = NLA_U8 }, [ETHTOOL_A_PAUSE_TX] = { .type = NLA_U8 }, [ETHTOOL_A_PAUSE_STATS_SRC] = { .type = NLA_REJECT },};
static intethnl_set_pause_validate(struct ethnl_req_info *req_info, struct genl_info *info){ const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
return ops->get_pauseparam && ops->set_pauseparam ? 1 : -EOPNOTSUPP;}
static intethnl_set_pause(struct ethnl_req_info *req_info, struct genl_info *info){ struct net_device *dev = req_info->dev; struct ethtool_pauseparam params = {}; struct nlattr **tb = info->attrs; bool mod = false; int ret;
dev->ethtool_ops->get_pauseparam(dev, ¶ms);
ethnl_update_bool32(¶ms.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod); ethnl_update_bool32(¶ms.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod); ethnl_update_bool32(¶ms.tx_pause, tb[ETHTOOL_A_PAUSE_TX], &mod); if (!mod) return 0;
ret = dev->ethtool_ops->set_pauseparam(dev, ¶ms); return ret < 0 ? ret : 1;}
const struct ethnl_request_ops ethnl_pause_request_ops = { .request_cmd = ETHTOOL_MSG_PAUSE_GET, .reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY, .hdr_attr = ETHTOOL_A_PAUSE_HEADER, .req_info_size = sizeof(struct pause_req_info), .reply_data_size = sizeof(struct pause_reply_data),
.parse_request = pause_parse_request, .prepare_data = pause_prepare_data, .reply_size = pause_reply_size, .fill_reply = pause_fill_reply,
.set_validate = ethnl_set_pause_validate, .set = ethnl_set_pause, .set_ntf_cmd = ETHTOOL_MSG_PAUSE_NTF,};