forked from Minki/linux
34ac17ecbf
It seems I missed that most ethnl_parse_header_dev_get() callers
declare an on-stack struct ethnl_req_info, and that they simply call
dev_put(req_info.dev) when about to return.
Add ethnl_parse_header_dev_put() helper to properly untrack
reference taken by ethnl_parse_header_dev_get().
Fixes: e4b8954074 ("netlink: add net device refcount tracker to struct ethnl_req_info")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
311 lines
8.2 KiB
C
311 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
#include "netlink.h"
|
|
#include "common.h"
|
|
#include "bitset.h"
|
|
|
|
struct fec_req_info {
|
|
struct ethnl_req_info base;
|
|
};
|
|
|
|
struct fec_reply_data {
|
|
struct ethnl_reply_data base;
|
|
__ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes);
|
|
u32 active_fec;
|
|
u8 fec_auto;
|
|
struct fec_stat_grp {
|
|
u64 stats[1 + ETHTOOL_MAX_LANES];
|
|
u8 cnt;
|
|
} corr, uncorr, corr_bits;
|
|
};
|
|
|
|
#define FEC_REPDATA(__reply_base) \
|
|
container_of(__reply_base, struct fec_reply_data, base)
|
|
|
|
#define ETHTOOL_FEC_MASK ((ETHTOOL_FEC_LLRS << 1) - 1)
|
|
|
|
const struct nla_policy ethnl_fec_get_policy[ETHTOOL_A_FEC_HEADER + 1] = {
|
|
[ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats),
|
|
};
|
|
|
|
static void
|
|
ethtool_fec_to_link_modes(u32 fec, unsigned long *link_modes, u8 *fec_auto)
|
|
{
|
|
if (fec_auto)
|
|
*fec_auto = !!(fec & ETHTOOL_FEC_AUTO);
|
|
|
|
if (fec & ETHTOOL_FEC_OFF)
|
|
__set_bit(ETHTOOL_LINK_MODE_FEC_NONE_BIT, link_modes);
|
|
if (fec & ETHTOOL_FEC_RS)
|
|
__set_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, link_modes);
|
|
if (fec & ETHTOOL_FEC_BASER)
|
|
__set_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, link_modes);
|
|
if (fec & ETHTOOL_FEC_LLRS)
|
|
__set_bit(ETHTOOL_LINK_MODE_FEC_LLRS_BIT, link_modes);
|
|
}
|
|
|
|
static int
|
|
ethtool_link_modes_to_fecparam(struct ethtool_fecparam *fec,
|
|
unsigned long *link_modes, u8 fec_auto)
|
|
{
|
|
memset(fec, 0, sizeof(*fec));
|
|
|
|
if (fec_auto)
|
|
fec->fec |= ETHTOOL_FEC_AUTO;
|
|
|
|
if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_NONE_BIT, link_modes))
|
|
fec->fec |= ETHTOOL_FEC_OFF;
|
|
if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, link_modes))
|
|
fec->fec |= ETHTOOL_FEC_RS;
|
|
if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, link_modes))
|
|
fec->fec |= ETHTOOL_FEC_BASER;
|
|
if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_LLRS_BIT, link_modes))
|
|
fec->fec |= ETHTOOL_FEC_LLRS;
|
|
|
|
if (!bitmap_empty(link_modes, __ETHTOOL_LINK_MODE_MASK_NBITS))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
fec_stats_recalc(struct fec_stat_grp *grp, struct ethtool_fec_stat *stats)
|
|
{
|
|
int i;
|
|
|
|
if (stats->lanes[0] == ETHTOOL_STAT_NOT_SET) {
|
|
grp->stats[0] = stats->total;
|
|
grp->cnt = stats->total != ETHTOOL_STAT_NOT_SET;
|
|
return;
|
|
}
|
|
|
|
grp->cnt = 1;
|
|
grp->stats[0] = 0;
|
|
for (i = 0; i < ETHTOOL_MAX_LANES; i++) {
|
|
if (stats->lanes[i] == ETHTOOL_STAT_NOT_SET)
|
|
break;
|
|
|
|
grp->stats[0] += stats->lanes[i];
|
|
grp->stats[grp->cnt++] = stats->lanes[i];
|
|
}
|
|
}
|
|
|
|
static int fec_prepare_data(const struct ethnl_req_info *req_base,
|
|
struct ethnl_reply_data *reply_base,
|
|
struct genl_info *info)
|
|
{
|
|
__ETHTOOL_DECLARE_LINK_MODE_MASK(active_fec_modes) = {};
|
|
struct fec_reply_data *data = FEC_REPDATA(reply_base);
|
|
struct net_device *dev = reply_base->dev;
|
|
struct ethtool_fecparam fec = {};
|
|
int ret;
|
|
|
|
if (!dev->ethtool_ops->get_fecparam)
|
|
return -EOPNOTSUPP;
|
|
ret = ethnl_ops_begin(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = dev->ethtool_ops->get_fecparam(dev, &fec);
|
|
if (ret)
|
|
goto out_complete;
|
|
if (req_base->flags & ETHTOOL_FLAG_STATS &&
|
|
dev->ethtool_ops->get_fec_stats) {
|
|
struct ethtool_fec_stats stats;
|
|
|
|
ethtool_stats_init((u64 *)&stats, sizeof(stats) / 8);
|
|
dev->ethtool_ops->get_fec_stats(dev, &stats);
|
|
|
|
fec_stats_recalc(&data->corr, &stats.corrected_blocks);
|
|
fec_stats_recalc(&data->uncorr, &stats.uncorrectable_blocks);
|
|
fec_stats_recalc(&data->corr_bits, &stats.corrected_bits);
|
|
}
|
|
|
|
WARN_ON_ONCE(fec.reserved);
|
|
|
|
ethtool_fec_to_link_modes(fec.fec, data->fec_link_modes,
|
|
&data->fec_auto);
|
|
|
|
ethtool_fec_to_link_modes(fec.active_fec, active_fec_modes, NULL);
|
|
data->active_fec = find_first_bit(active_fec_modes,
|
|
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
|
/* Don't report attr if no FEC mode set. Note that
|
|
* ethtool_fecparam_to_link_modes() ignores NONE and AUTO.
|
|
*/
|
|
if (data->active_fec == __ETHTOOL_LINK_MODE_MASK_NBITS)
|
|
data->active_fec = 0;
|
|
|
|
out_complete:
|
|
ethnl_ops_complete(dev);
|
|
return ret;
|
|
}
|
|
|
|
static int fec_reply_size(const struct ethnl_req_info *req_base,
|
|
const struct ethnl_reply_data *reply_base)
|
|
{
|
|
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
|
|
const struct fec_reply_data *data = FEC_REPDATA(reply_base);
|
|
int len = 0;
|
|
int ret;
|
|
|
|
ret = ethnl_bitset_size(data->fec_link_modes, NULL,
|
|
__ETHTOOL_LINK_MODE_MASK_NBITS,
|
|
link_mode_names, compact);
|
|
if (ret < 0)
|
|
return ret;
|
|
len += ret;
|
|
|
|
len += nla_total_size(sizeof(u8)) + /* _FEC_AUTO */
|
|
nla_total_size(sizeof(u32)); /* _FEC_ACTIVE */
|
|
|
|
if (req_base->flags & ETHTOOL_FLAG_STATS)
|
|
len += 3 * nla_total_size_64bit(sizeof(u64) *
|
|
(1 + ETHTOOL_MAX_LANES));
|
|
|
|
return len;
|
|
}
|
|
|
|
static int fec_put_stats(struct sk_buff *skb, const struct fec_reply_data *data)
|
|
{
|
|
struct nlattr *nest;
|
|
|
|
nest = nla_nest_start(skb, ETHTOOL_A_FEC_STATS);
|
|
if (!nest)
|
|
return -EMSGSIZE;
|
|
|
|
if (nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_CORRECTED,
|
|
sizeof(u64) * data->corr.cnt,
|
|
data->corr.stats, ETHTOOL_A_FEC_STAT_PAD) ||
|
|
nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_UNCORR,
|
|
sizeof(u64) * data->uncorr.cnt,
|
|
data->uncorr.stats, ETHTOOL_A_FEC_STAT_PAD) ||
|
|
nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_CORR_BITS,
|
|
sizeof(u64) * data->corr_bits.cnt,
|
|
data->corr_bits.stats, ETHTOOL_A_FEC_STAT_PAD))
|
|
goto err_cancel;
|
|
|
|
nla_nest_end(skb, nest);
|
|
return 0;
|
|
|
|
err_cancel:
|
|
nla_nest_cancel(skb, nest);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int fec_fill_reply(struct sk_buff *skb,
|
|
const struct ethnl_req_info *req_base,
|
|
const struct ethnl_reply_data *reply_base)
|
|
{
|
|
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
|
|
const struct fec_reply_data *data = FEC_REPDATA(reply_base);
|
|
int ret;
|
|
|
|
ret = ethnl_put_bitset(skb, ETHTOOL_A_FEC_MODES,
|
|
data->fec_link_modes, NULL,
|
|
__ETHTOOL_LINK_MODE_MASK_NBITS,
|
|
link_mode_names, compact);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (nla_put_u8(skb, ETHTOOL_A_FEC_AUTO, data->fec_auto) ||
|
|
(data->active_fec &&
|
|
nla_put_u32(skb, ETHTOOL_A_FEC_ACTIVE, data->active_fec)))
|
|
return -EMSGSIZE;
|
|
|
|
if (req_base->flags & ETHTOOL_FLAG_STATS && fec_put_stats(skb, data))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct ethnl_request_ops ethnl_fec_request_ops = {
|
|
.request_cmd = ETHTOOL_MSG_FEC_GET,
|
|
.reply_cmd = ETHTOOL_MSG_FEC_GET_REPLY,
|
|
.hdr_attr = ETHTOOL_A_FEC_HEADER,
|
|
.req_info_size = sizeof(struct fec_req_info),
|
|
.reply_data_size = sizeof(struct fec_reply_data),
|
|
|
|
.prepare_data = fec_prepare_data,
|
|
.reply_size = fec_reply_size,
|
|
.fill_reply = fec_fill_reply,
|
|
};
|
|
|
|
/* FEC_SET */
|
|
|
|
const struct nla_policy ethnl_fec_set_policy[ETHTOOL_A_FEC_AUTO + 1] = {
|
|
[ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
|
|
[ETHTOOL_A_FEC_MODES] = { .type = NLA_NESTED },
|
|
[ETHTOOL_A_FEC_AUTO] = NLA_POLICY_MAX(NLA_U8, 1),
|
|
};
|
|
|
|
int ethnl_set_fec(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
__ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes) = {};
|
|
struct ethnl_req_info req_info = {};
|
|
struct nlattr **tb = info->attrs;
|
|
struct ethtool_fecparam fec = {};
|
|
const struct ethtool_ops *ops;
|
|
struct net_device *dev;
|
|
bool mod = false;
|
|
u8 fec_auto;
|
|
int ret;
|
|
|
|
ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_FEC_HEADER],
|
|
genl_info_net(info), info->extack,
|
|
true);
|
|
if (ret < 0)
|
|
return ret;
|
|
dev = req_info.dev;
|
|
ops = dev->ethtool_ops;
|
|
ret = -EOPNOTSUPP;
|
|
if (!ops->get_fecparam || !ops->set_fecparam)
|
|
goto out_dev;
|
|
|
|
rtnl_lock();
|
|
ret = ethnl_ops_begin(dev);
|
|
if (ret < 0)
|
|
goto out_rtnl;
|
|
ret = ops->get_fecparam(dev, &fec);
|
|
if (ret < 0)
|
|
goto out_ops;
|
|
|
|
ethtool_fec_to_link_modes(fec.fec, fec_link_modes, &fec_auto);
|
|
|
|
ret = ethnl_update_bitset(fec_link_modes,
|
|
__ETHTOOL_LINK_MODE_MASK_NBITS,
|
|
tb[ETHTOOL_A_FEC_MODES],
|
|
link_mode_names, info->extack, &mod);
|
|
if (ret < 0)
|
|
goto out_ops;
|
|
ethnl_update_u8(&fec_auto, tb[ETHTOOL_A_FEC_AUTO], &mod);
|
|
|
|
ret = 0;
|
|
if (!mod)
|
|
goto out_ops;
|
|
|
|
ret = ethtool_link_modes_to_fecparam(&fec, fec_link_modes, fec_auto);
|
|
if (ret) {
|
|
NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES],
|
|
"invalid FEC modes requested");
|
|
goto out_ops;
|
|
}
|
|
if (!fec.fec) {
|
|
ret = -EINVAL;
|
|
NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES],
|
|
"no FEC modes set");
|
|
goto out_ops;
|
|
}
|
|
|
|
ret = dev->ethtool_ops->set_fecparam(dev, &fec);
|
|
if (ret < 0)
|
|
goto out_ops;
|
|
ethtool_notify(dev, ETHTOOL_MSG_FEC_NTF, NULL);
|
|
|
|
out_ops:
|
|
ethnl_ops_complete(dev);
|
|
out_rtnl:
|
|
rtnl_unlock();
|
|
out_dev:
|
|
ethnl_parse_header_dev_put(&req_info);
|
|
return ret;
|
|
}
|