linux/net/ethtool/linkmodes.c
Jakub Kicinski 329d9c333e ethtool: link up ethnl_header_policy as a nested policy
To get the most out of parsing by the core, and to allow dumping
full policies we need to specify which policy applies to nested
attrs. For headers it's ethnl_header_policy.

$ sed -i 's@\(ETHTOOL_A_.*HEADER\].*=\) { .type = NLA_NESTED },@\1\n\t\tNLA_POLICY_NESTED(ethnl_header_policy),@' net/ethtool/*

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06 06:25:55 -07:00

432 lines
14 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
#include "netlink.h"
#include "common.h"
#include "bitset.h"
struct linkmodes_req_info {
struct ethnl_req_info base;
};
struct linkmodes_reply_data {
struct ethnl_reply_data base;
struct ethtool_link_ksettings ksettings;
struct ethtool_link_settings *lsettings;
bool peer_empty;
};
#define LINKMODES_REPDATA(__reply_base) \
container_of(__reply_base, struct linkmodes_reply_data, base)
const struct nla_policy ethnl_linkmodes_get_policy[] = {
[ETHTOOL_A_LINKMODES_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static int linkmodes_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
int ret;
data->lsettings = &data->ksettings.base;
ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
ret = __ethtool_get_link_ksettings(dev, &data->ksettings);
if (ret < 0 && info) {
GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
goto out;
}
data->peer_empty =
bitmap_empty(data->ksettings.link_modes.lp_advertising,
__ETHTOOL_LINK_MODE_MASK_NBITS);
out:
ethnl_ops_complete(dev);
return ret;
}
static int linkmodes_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
const struct ethtool_link_ksettings *ksettings = &data->ksettings;
const struct ethtool_link_settings *lsettings = &ksettings->base;
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
int len, ret;
len = nla_total_size(sizeof(u8)) /* LINKMODES_AUTONEG */
+ nla_total_size(sizeof(u32)) /* LINKMODES_SPEED */
+ nla_total_size(sizeof(u8)) /* LINKMODES_DUPLEX */
+ 0;
ret = ethnl_bitset_size(ksettings->link_modes.advertising,
ksettings->link_modes.supported,
__ETHTOOL_LINK_MODE_MASK_NBITS,
link_mode_names, compact);
if (ret < 0)
return ret;
len += ret;
if (!data->peer_empty) {
ret = ethnl_bitset_size(ksettings->link_modes.lp_advertising,
NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
link_mode_names, compact);
if (ret < 0)
return ret;
len += ret;
}
if (lsettings->master_slave_cfg != MASTER_SLAVE_CFG_UNSUPPORTED)
len += nla_total_size(sizeof(u8));
if (lsettings->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED)
len += nla_total_size(sizeof(u8));
return len;
}
static int linkmodes_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
const struct ethtool_link_ksettings *ksettings = &data->ksettings;
const struct ethtool_link_settings *lsettings = &ksettings->base;
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
int ret;
if (nla_put_u8(skb, ETHTOOL_A_LINKMODES_AUTONEG, lsettings->autoneg))
return -EMSGSIZE;
ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_OURS,
ksettings->link_modes.advertising,
ksettings->link_modes.supported,
__ETHTOOL_LINK_MODE_MASK_NBITS, link_mode_names,
compact);
if (ret < 0)
return -EMSGSIZE;
if (!data->peer_empty) {
ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_PEER,
ksettings->link_modes.lp_advertising,
NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
link_mode_names, compact);
if (ret < 0)
return -EMSGSIZE;
}
if (nla_put_u32(skb, ETHTOOL_A_LINKMODES_SPEED, lsettings->speed) ||
nla_put_u8(skb, ETHTOOL_A_LINKMODES_DUPLEX, lsettings->duplex))
return -EMSGSIZE;
if (lsettings->master_slave_cfg != MASTER_SLAVE_CFG_UNSUPPORTED &&
nla_put_u8(skb, ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG,
lsettings->master_slave_cfg))
return -EMSGSIZE;
if (lsettings->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED &&
nla_put_u8(skb, ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE,
lsettings->master_slave_state))
return -EMSGSIZE;
return 0;
}
const struct ethnl_request_ops ethnl_linkmodes_request_ops = {
.request_cmd = ETHTOOL_MSG_LINKMODES_GET,
.reply_cmd = ETHTOOL_MSG_LINKMODES_GET_REPLY,
.hdr_attr = ETHTOOL_A_LINKMODES_HEADER,
.req_info_size = sizeof(struct linkmodes_req_info),
.reply_data_size = sizeof(struct linkmodes_reply_data),
.prepare_data = linkmodes_prepare_data,
.reply_size = linkmodes_reply_size,
.fill_reply = linkmodes_fill_reply,
};
/* LINKMODES_SET */
struct link_mode_info {
int speed;
u8 duplex;
};
#define __DEFINE_LINK_MODE_PARAMS(_speed, _type, _duplex) \
[ETHTOOL_LINK_MODE(_speed, _type, _duplex)] = { \
.speed = SPEED_ ## _speed, \
.duplex = __DUPLEX_ ## _duplex \
}
#define __DUPLEX_Half DUPLEX_HALF
#define __DUPLEX_Full DUPLEX_FULL
#define __DEFINE_SPECIAL_MODE_PARAMS(_mode) \
[ETHTOOL_LINK_MODE_ ## _mode ## _BIT] = { \
.speed = SPEED_UNKNOWN, \
.duplex = DUPLEX_UNKNOWN, \
}
static const struct link_mode_info link_mode_params[] = {
__DEFINE_LINK_MODE_PARAMS(10, T, Half),
__DEFINE_LINK_MODE_PARAMS(10, T, Full),
__DEFINE_LINK_MODE_PARAMS(100, T, Half),
__DEFINE_LINK_MODE_PARAMS(100, T, Full),
__DEFINE_LINK_MODE_PARAMS(1000, T, Half),
__DEFINE_LINK_MODE_PARAMS(1000, T, Full),
__DEFINE_SPECIAL_MODE_PARAMS(Autoneg),
__DEFINE_SPECIAL_MODE_PARAMS(TP),
__DEFINE_SPECIAL_MODE_PARAMS(AUI),
__DEFINE_SPECIAL_MODE_PARAMS(MII),
__DEFINE_SPECIAL_MODE_PARAMS(FIBRE),
__DEFINE_SPECIAL_MODE_PARAMS(BNC),
__DEFINE_LINK_MODE_PARAMS(10000, T, Full),
__DEFINE_SPECIAL_MODE_PARAMS(Pause),
__DEFINE_SPECIAL_MODE_PARAMS(Asym_Pause),
__DEFINE_LINK_MODE_PARAMS(2500, X, Full),
__DEFINE_SPECIAL_MODE_PARAMS(Backplane),
__DEFINE_LINK_MODE_PARAMS(1000, KX, Full),
__DEFINE_LINK_MODE_PARAMS(10000, KX4, Full),
__DEFINE_LINK_MODE_PARAMS(10000, KR, Full),
[ETHTOOL_LINK_MODE_10000baseR_FEC_BIT] = {
.speed = SPEED_10000,
.duplex = DUPLEX_FULL,
},
__DEFINE_LINK_MODE_PARAMS(20000, MLD2, Full),
__DEFINE_LINK_MODE_PARAMS(20000, KR2, Full),
__DEFINE_LINK_MODE_PARAMS(40000, KR4, Full),
__DEFINE_LINK_MODE_PARAMS(40000, CR4, Full),
__DEFINE_LINK_MODE_PARAMS(40000, SR4, Full),
__DEFINE_LINK_MODE_PARAMS(40000, LR4, Full),
__DEFINE_LINK_MODE_PARAMS(56000, KR4, Full),
__DEFINE_LINK_MODE_PARAMS(56000, CR4, Full),
__DEFINE_LINK_MODE_PARAMS(56000, SR4, Full),
__DEFINE_LINK_MODE_PARAMS(56000, LR4, Full),
__DEFINE_LINK_MODE_PARAMS(25000, CR, Full),
__DEFINE_LINK_MODE_PARAMS(25000, KR, Full),
__DEFINE_LINK_MODE_PARAMS(25000, SR, Full),
__DEFINE_LINK_MODE_PARAMS(50000, CR2, Full),
__DEFINE_LINK_MODE_PARAMS(50000, KR2, Full),
__DEFINE_LINK_MODE_PARAMS(100000, KR4, Full),
__DEFINE_LINK_MODE_PARAMS(100000, SR4, Full),
__DEFINE_LINK_MODE_PARAMS(100000, CR4, Full),
__DEFINE_LINK_MODE_PARAMS(100000, LR4_ER4, Full),
__DEFINE_LINK_MODE_PARAMS(50000, SR2, Full),
__DEFINE_LINK_MODE_PARAMS(1000, X, Full),
__DEFINE_LINK_MODE_PARAMS(10000, CR, Full),
__DEFINE_LINK_MODE_PARAMS(10000, SR, Full),
__DEFINE_LINK_MODE_PARAMS(10000, LR, Full),
__DEFINE_LINK_MODE_PARAMS(10000, LRM, Full),
__DEFINE_LINK_MODE_PARAMS(10000, ER, Full),
__DEFINE_LINK_MODE_PARAMS(2500, T, Full),
__DEFINE_LINK_MODE_PARAMS(5000, T, Full),
__DEFINE_SPECIAL_MODE_PARAMS(FEC_NONE),
__DEFINE_SPECIAL_MODE_PARAMS(FEC_RS),
__DEFINE_SPECIAL_MODE_PARAMS(FEC_BASER),
__DEFINE_LINK_MODE_PARAMS(50000, KR, Full),
__DEFINE_LINK_MODE_PARAMS(50000, SR, Full),
__DEFINE_LINK_MODE_PARAMS(50000, CR, Full),
__DEFINE_LINK_MODE_PARAMS(50000, LR_ER_FR, Full),
__DEFINE_LINK_MODE_PARAMS(50000, DR, Full),
__DEFINE_LINK_MODE_PARAMS(100000, KR2, Full),
__DEFINE_LINK_MODE_PARAMS(100000, SR2, Full),
__DEFINE_LINK_MODE_PARAMS(100000, CR2, Full),
__DEFINE_LINK_MODE_PARAMS(100000, LR2_ER2_FR2, Full),
__DEFINE_LINK_MODE_PARAMS(100000, DR2, Full),
__DEFINE_LINK_MODE_PARAMS(200000, KR4, Full),
__DEFINE_LINK_MODE_PARAMS(200000, SR4, Full),
__DEFINE_LINK_MODE_PARAMS(200000, LR4_ER4_FR4, Full),
__DEFINE_LINK_MODE_PARAMS(200000, DR4, Full),
__DEFINE_LINK_MODE_PARAMS(200000, CR4, Full),
__DEFINE_LINK_MODE_PARAMS(100, T1, Full),
__DEFINE_LINK_MODE_PARAMS(1000, T1, Full),
__DEFINE_LINK_MODE_PARAMS(400000, KR8, Full),
__DEFINE_LINK_MODE_PARAMS(400000, SR8, Full),
__DEFINE_LINK_MODE_PARAMS(400000, LR8_ER8_FR8, Full),
__DEFINE_LINK_MODE_PARAMS(400000, DR8, Full),
__DEFINE_LINK_MODE_PARAMS(400000, CR8, Full),
__DEFINE_SPECIAL_MODE_PARAMS(FEC_LLRS),
__DEFINE_LINK_MODE_PARAMS(100000, KR, Full),
__DEFINE_LINK_MODE_PARAMS(100000, SR, Full),
__DEFINE_LINK_MODE_PARAMS(100000, LR_ER_FR, Full),
__DEFINE_LINK_MODE_PARAMS(100000, DR, Full),
__DEFINE_LINK_MODE_PARAMS(100000, CR, Full),
__DEFINE_LINK_MODE_PARAMS(200000, KR2, Full),
__DEFINE_LINK_MODE_PARAMS(200000, SR2, Full),
__DEFINE_LINK_MODE_PARAMS(200000, LR2_ER2_FR2, Full),
__DEFINE_LINK_MODE_PARAMS(200000, DR2, Full),
__DEFINE_LINK_MODE_PARAMS(200000, CR2, Full),
__DEFINE_LINK_MODE_PARAMS(400000, KR4, Full),
__DEFINE_LINK_MODE_PARAMS(400000, SR4, Full),
__DEFINE_LINK_MODE_PARAMS(400000, LR4_ER4_FR4, Full),
__DEFINE_LINK_MODE_PARAMS(400000, DR4, Full),
__DEFINE_LINK_MODE_PARAMS(400000, CR4, Full),
__DEFINE_LINK_MODE_PARAMS(100, FX, Half),
__DEFINE_LINK_MODE_PARAMS(100, FX, Full),
};
const struct nla_policy ethnl_linkmodes_set_policy[] = {
[ETHTOOL_A_LINKMODES_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_LINKMODES_AUTONEG] = { .type = NLA_U8 },
[ETHTOOL_A_LINKMODES_OURS] = { .type = NLA_NESTED },
[ETHTOOL_A_LINKMODES_SPEED] = { .type = NLA_U32 },
[ETHTOOL_A_LINKMODES_DUPLEX] = { .type = NLA_U8 },
[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG] = { .type = NLA_U8 },
};
/* Set advertised link modes to all supported modes matching requested speed
* and duplex values. Called when autonegotiation is on, speed or duplex is
* requested but no link mode change. This is done in userspace with ioctl()
* interface, move it into kernel for netlink.
* Returns true if advertised modes bitmap was modified.
*/
static bool ethnl_auto_linkmodes(struct ethtool_link_ksettings *ksettings,
bool req_speed, bool req_duplex)
{
unsigned long *advertising = ksettings->link_modes.advertising;
unsigned long *supported = ksettings->link_modes.supported;
DECLARE_BITMAP(old_adv, __ETHTOOL_LINK_MODE_MASK_NBITS);
unsigned int i;
BUILD_BUG_ON(ARRAY_SIZE(link_mode_params) !=
__ETHTOOL_LINK_MODE_MASK_NBITS);
bitmap_copy(old_adv, advertising, __ETHTOOL_LINK_MODE_MASK_NBITS);
for (i = 0; i < __ETHTOOL_LINK_MODE_MASK_NBITS; i++) {
const struct link_mode_info *info = &link_mode_params[i];
if (info->speed == SPEED_UNKNOWN)
continue;
if (test_bit(i, supported) &&
(!req_speed || info->speed == ksettings->base.speed) &&
(!req_duplex || info->duplex == ksettings->base.duplex))
set_bit(i, advertising);
else
clear_bit(i, advertising);
}
return !bitmap_equal(old_adv, advertising,
__ETHTOOL_LINK_MODE_MASK_NBITS);
}
static bool ethnl_validate_master_slave_cfg(u8 cfg)
{
switch (cfg) {
case MASTER_SLAVE_CFG_MASTER_PREFERRED:
case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
case MASTER_SLAVE_CFG_MASTER_FORCE:
case MASTER_SLAVE_CFG_SLAVE_FORCE:
return true;
}
return false;
}
static int ethnl_update_linkmodes(struct genl_info *info, struct nlattr **tb,
struct ethtool_link_ksettings *ksettings,
bool *mod)
{
struct ethtool_link_settings *lsettings = &ksettings->base;
bool req_speed, req_duplex;
const struct nlattr *master_slave_cfg;
int ret;
master_slave_cfg = tb[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG];
if (master_slave_cfg) {
u8 cfg = nla_get_u8(master_slave_cfg);
if (lsettings->master_slave_cfg == MASTER_SLAVE_CFG_UNSUPPORTED) {
NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
"master/slave configuration not supported by device");
return -EOPNOTSUPP;
}
if (!ethnl_validate_master_slave_cfg(cfg)) {
NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
"master/slave value is invalid");
return -EOPNOTSUPP;
}
}
*mod = false;
req_speed = tb[ETHTOOL_A_LINKMODES_SPEED];
req_duplex = tb[ETHTOOL_A_LINKMODES_DUPLEX];
ethnl_update_u8(&lsettings->autoneg, tb[ETHTOOL_A_LINKMODES_AUTONEG],
mod);
ret = ethnl_update_bitset(ksettings->link_modes.advertising,
__ETHTOOL_LINK_MODE_MASK_NBITS,
tb[ETHTOOL_A_LINKMODES_OURS], link_mode_names,
info->extack, mod);
if (ret < 0)
return ret;
ethnl_update_u32(&lsettings->speed, tb[ETHTOOL_A_LINKMODES_SPEED],
mod);
ethnl_update_u8(&lsettings->duplex, tb[ETHTOOL_A_LINKMODES_DUPLEX],
mod);
ethnl_update_u8(&lsettings->master_slave_cfg, master_slave_cfg, mod);
if (!tb[ETHTOOL_A_LINKMODES_OURS] && lsettings->autoneg &&
(req_speed || req_duplex) &&
ethnl_auto_linkmodes(ksettings, req_speed, req_duplex))
*mod = true;
return 0;
}
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
{
struct ethtool_link_ksettings ksettings = {};
struct ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
struct net_device *dev;
bool mod = false;
int ret;
ret = ethnl_parse_header_dev_get(&req_info,
tb[ETHTOOL_A_LINKMODES_HEADER],
genl_info_net(info), info->extack,
true);
if (ret < 0)
return ret;
dev = req_info.dev;
ret = -EOPNOTSUPP;
if (!dev->ethtool_ops->get_link_ksettings ||
!dev->ethtool_ops->set_link_ksettings)
goto out_dev;
rtnl_lock();
ret = ethnl_ops_begin(dev);
if (ret < 0)
goto out_rtnl;
ret = __ethtool_get_link_ksettings(dev, &ksettings);
if (ret < 0) {
GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
goto out_ops;
}
ret = ethnl_update_linkmodes(info, tb, &ksettings, &mod);
if (ret < 0)
goto out_ops;
if (mod) {
ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
if (ret < 0)
GENL_SET_ERR_MSG(info, "link settings update failed");
else
ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
}
out_ops:
ethnl_ops_complete(dev);
out_rtnl:
rtnl_unlock();
out_dev:
dev_put(dev);
return ret;
}