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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196// SPDX-License-Identifier: GPL-2.0-only
#include "bitset.h"#include "common.h"#include "netlink.h"
struct privflags_req_info { struct ethnl_req_info base;};
struct privflags_reply_data { struct ethnl_reply_data base; const char (*priv_flag_names)[ETH_GSTRING_LEN]; unsigned int n_priv_flags; u32 priv_flags;};
#define PRIVFLAGS_REPDATA(__reply_base) \ container_of(__reply_base, struct privflags_reply_data, base)
const struct nla_policy ethnl_privflags_get_policy[] = { [ETHTOOL_A_PRIVFLAGS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),};
static int ethnl_get_priv_flags_info(struct net_device *dev, unsigned int *count, const char (**names)[ETH_GSTRING_LEN]){ const struct ethtool_ops *ops = dev->ethtool_ops; int nflags;
nflags = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS); if (nflags < 0) return nflags;
if (names) { *names = kcalloc(nflags, ETH_GSTRING_LEN, GFP_KERNEL); if (!*names) return -ENOMEM; ops->get_strings(dev, ETH_SS_PRIV_FLAGS, (u8 *)*names); }
/* We can pass more than 32 private flags to userspace via netlink but * we cannot get more with ethtool_ops::get_priv_flags(). Note that we * must not adjust nflags before allocating the space for flag names * as the buffer must be large enough for all flags. */ if (WARN_ONCE(nflags > 32, "device %s reports more than 32 private flags (%d)\n", netdev_name(dev), nflags)) nflags = 32; *count = nflags;
return 0;}
static int privflags_prepare_data(const struct ethnl_req_info *req_base, struct ethnl_reply_data *reply_base, const struct genl_info *info){ struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base); struct net_device *dev = reply_base->dev; const char (*names)[ETH_GSTRING_LEN]; const struct ethtool_ops *ops; unsigned int nflags; int ret;
ops = dev->ethtool_ops; if (!ops->get_priv_flags || !ops->get_sset_count || !ops->get_strings) return -EOPNOTSUPP; ret = ethnl_ops_begin(dev); if (ret < 0) return ret;
ret = ethnl_get_priv_flags_info(dev, &nflags, &names); if (ret < 0) goto out_ops; data->priv_flags = ops->get_priv_flags(dev); data->priv_flag_names = names; data->n_priv_flags = nflags;
out_ops: ethnl_ops_complete(dev); return ret;}
static int privflags_reply_size(const struct ethnl_req_info *req_base, const struct ethnl_reply_data *reply_base){ const struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base); bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; const u32 all_flags = ~(u32)0 >> (32 - data->n_priv_flags);
return ethnl_bitset32_size(&data->priv_flags, &all_flags, data->n_priv_flags, data->priv_flag_names, compact);}
static int privflags_fill_reply(struct sk_buff *skb, const struct ethnl_req_info *req_base, const struct ethnl_reply_data *reply_base){ const struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base); bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; const u32 all_flags = ~(u32)0 >> (32 - data->n_priv_flags);
return ethnl_put_bitset32(skb, ETHTOOL_A_PRIVFLAGS_FLAGS, &data->priv_flags, &all_flags, data->n_priv_flags, data->priv_flag_names, compact);}
static void privflags_cleanup_data(struct ethnl_reply_data *reply_data){ struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_data);
kfree(data->priv_flag_names);}
/* PRIVFLAGS_SET */
const struct nla_policy ethnl_privflags_set_policy[] = { [ETHTOOL_A_PRIVFLAGS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), [ETHTOOL_A_PRIVFLAGS_FLAGS] = { .type = NLA_NESTED },};
static intethnl_set_privflags_validate(struct ethnl_req_info *req_info, struct genl_info *info){ const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
if (!info->attrs[ETHTOOL_A_PRIVFLAGS_FLAGS]) return -EINVAL;
if (!ops->get_priv_flags || !ops->set_priv_flags || !ops->get_sset_count || !ops->get_strings) return -EOPNOTSUPP; return 1;}
static intethnl_set_privflags(struct ethnl_req_info *req_info, struct genl_info *info){ const char (*names)[ETH_GSTRING_LEN] = NULL; struct net_device *dev = req_info->dev; struct nlattr **tb = info->attrs; unsigned int nflags; bool mod = false; bool compact; u32 flags; int ret;
ret = ethnl_bitset_is_compact(tb[ETHTOOL_A_PRIVFLAGS_FLAGS], &compact); if (ret < 0) return ret;
ret = ethnl_get_priv_flags_info(dev, &nflags, compact ? NULL : &names); if (ret < 0) return ret; flags = dev->ethtool_ops->get_priv_flags(dev);
ret = ethnl_update_bitset32(&flags, nflags, tb[ETHTOOL_A_PRIVFLAGS_FLAGS], names, info->extack, &mod); if (ret < 0 || !mod) goto out_free; ret = dev->ethtool_ops->set_priv_flags(dev, flags); if (ret < 0) goto out_free; ret = 1;
out_free: kfree(names); return ret;}
const struct ethnl_request_ops ethnl_privflags_request_ops = { .request_cmd = ETHTOOL_MSG_PRIVFLAGS_GET, .reply_cmd = ETHTOOL_MSG_PRIVFLAGS_GET_REPLY, .hdr_attr = ETHTOOL_A_PRIVFLAGS_HEADER, .req_info_size = sizeof(struct privflags_req_info), .reply_data_size = sizeof(struct privflags_reply_data),
.prepare_data = privflags_prepare_data, .reply_size = privflags_reply_size, .fill_reply = privflags_fill_reply, .cleanup_data = privflags_cleanup_data,
.set_validate = ethnl_set_privflags_validate, .set = ethnl_set_privflags, .set_ntf_cmd = ETHTOOL_MSG_PRIVFLAGS_NTF,};