int ethtool_get_driver(int *fd, const char *ifname, char **ret) {
struct ethtool_drvinfo ecmd = {
.cmd = ETHTOOL_GDRVINFO
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
char *d;
int r;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0) {
log_warning("link_config: could not connect to ethtool: %s", strerror(-r));
return r;
}
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
d = strdup(ecmd.driver);
if (!d)
return -ENOMEM;
*ret = d;
return 0;
}
int ethtool_set_speed(int *fd, const char *ifname, unsigned int speed, Duplex duplex)
{
struct ethtool_cmd ecmd = {
.cmd = ETHTOOL_GSET
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
bool need_update = false;
int r;
if (speed == 0 && duplex == _DUP_INVALID)
return 0;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0) {
log_warning("link_config: could not connect to ethtool: %s", strerror(-r));
return r;
}
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
if (ethtool_cmd_speed(&ecmd) != speed) {
ethtool_cmd_speed_set(&ecmd, speed);
need_update = true;
}
switch (duplex) {
case DUP_HALF:
if (ecmd.duplex != DUPLEX_HALF) {
ecmd.duplex = DUPLEX_HALF;
need_update = true;
}
break;
case DUP_FULL:
if (ecmd.duplex != DUPLEX_FULL) {
ecmd.duplex = DUPLEX_FULL;
need_update = true;
}
break;
default:
break;
}
if (need_update) {
ecmd.cmd = ETHTOOL_SSET;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
}
return 0;
}
int ethtool_set_wol(int *fd, const char *ifname, WakeOnLan wol) {
struct ethtool_wolinfo ecmd = {
.cmd = ETHTOOL_GWOL
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
bool need_update = false;
int r;
if (wol == _WOL_INVALID)
return 0;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0) {
log_warning("link_config: could not connect to ethtool: %s", strerror(-r));
return r;
}
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
switch (wol) {
case WOL_PHY:
if (ecmd.wolopts != WAKE_PHY) {
ecmd.wolopts = WAKE_PHY;
need_update = true;
}
break;
case WOL_MAGIC:
if (ecmd.wolopts != WAKE_MAGIC) {
ecmd.wolopts = WAKE_MAGIC;
need_update = true;
}
break;
case WOL_OFF:
if (ecmd.wolopts != 0) {
ecmd.wolopts = 0;
need_update = true;
}
break;
default:
break;
}
if (need_update) {
ecmd.cmd = ETHTOOL_SWOL;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
}
return 0;
}
int ethtool_get_driver(int *fd, const char *ifname, char **ret) {
struct ethtool_drvinfo ecmd = {
.cmd = ETHTOOL_GDRVINFO
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
char *d;
int r;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0)
return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
d = strdup(ecmd.driver);
if (!d)
return -ENOMEM;
*ret = d;
return 0;
}
int ethtool_set_speed(int *fd, const char *ifname, unsigned int speed, Duplex duplex) {
struct ethtool_cmd ecmd = {
.cmd = ETHTOOL_GSET
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
bool need_update = false;
int r;
if (speed == 0 && duplex == _DUP_INVALID)
return 0;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0)
return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
if (ethtool_cmd_speed(&ecmd) != speed) {
ethtool_cmd_speed_set(&ecmd, speed);
need_update = true;
}
switch (duplex) {
case DUP_HALF:
if (ecmd.duplex != DUPLEX_HALF) {
ecmd.duplex = DUPLEX_HALF;
need_update = true;
}
break;
case DUP_FULL:
if (ecmd.duplex != DUPLEX_FULL) {
ecmd.duplex = DUPLEX_FULL;
need_update = true;
}
break;
default:
break;
}
if (need_update) {
ecmd.cmd = ETHTOOL_SSET;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
}
return 0;
}
int ethtool_set_wol(int *fd, const char *ifname, WakeOnLan wol) {
struct ethtool_wolinfo ecmd = {
.cmd = ETHTOOL_GWOL
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
bool need_update = false;
int r;
if (wol == _WOL_INVALID)
return 0;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0)
return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
switch (wol) {
case WOL_PHY:
if (ecmd.wolopts != WAKE_PHY) {
ecmd.wolopts = WAKE_PHY;
need_update = true;
}
break;
case WOL_UCAST:
if (ecmd.wolopts != WAKE_UCAST) {
ecmd.wolopts = WAKE_UCAST;
need_update = true;
}
break;
case WOL_MCAST:
if (ecmd.wolopts != WAKE_MCAST) {
ecmd.wolopts = WAKE_MCAST;
need_update = true;
}
break;
case WOL_BCAST:
if (ecmd.wolopts != WAKE_BCAST) {
ecmd.wolopts = WAKE_BCAST;
need_update = true;
}
break;
case WOL_ARP:
if (ecmd.wolopts != WAKE_ARP) {
ecmd.wolopts = WAKE_ARP;
need_update = true;
}
break;
case WOL_MAGIC:
if (ecmd.wolopts != WAKE_MAGIC) {
ecmd.wolopts = WAKE_MAGIC;
need_update = true;
}
break;
case WOL_MAGICSECURE:
if (ecmd.wolopts != WAKE_MAGICSECURE) {
ecmd.wolopts = WAKE_MAGICSECURE;
need_update = true;
}
break;
case WOL_OFF:
if (ecmd.wolopts != 0) {
ecmd.wolopts = 0;
need_update = true;
}
break;
default:
break;
}
if (need_update) {
ecmd.cmd = ETHTOOL_SWOL;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
}
return 0;
}
static int get_stringset(int fd, struct ifreq *ifr, int stringset_id, struct ethtool_gstrings **gstrings) {
_cleanup_free_ struct ethtool_gstrings *strings = NULL;
struct {
struct ethtool_sset_info info;
uint32_t space;
} buffer = {
.info = {
.cmd = ETHTOOL_GSSET_INFO,
.sset_mask = UINT64_C(1) << stringset_id,
},
};
unsigned len;
int r;
ifr->ifr_data = (void *) &buffer.info;
r = ioctl(fd, SIOCETHTOOL, ifr);
if (r < 0)
return -errno;
if (!buffer.info.sset_mask)
return -EINVAL;
len = buffer.info.data[0];
strings = malloc0(sizeof(struct ethtool_gstrings) + len * ETH_GSTRING_LEN);
if (!strings)
return -ENOMEM;
strings->cmd = ETHTOOL_GSTRINGS;
strings->string_set = stringset_id;
strings->len = len;
ifr->ifr_data = (void *) strings;
r = ioctl(fd, SIOCETHTOOL, ifr);
if (r < 0)
return -errno;
*gstrings = TAKE_PTR(strings);
return 0;
}
static int find_feature_index(struct ethtool_gstrings *strings, const char *feature) {
unsigned i;
for (i = 0; i < strings->len; i++) {
if (streq((char *) &strings->data[i * ETH_GSTRING_LEN], feature))
return i;
}
return -1;
}
int ethtool_set_features(int *fd, const char *ifname, int *features) {
_cleanup_free_ struct ethtool_gstrings *strings = NULL;
struct ethtool_sfeatures *sfeatures;
int block, bit, i, r;
struct ifreq ifr = {};
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0)
return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = get_stringset(*fd, &ifr, ETH_SS_FEATURES, &strings);
if (r < 0)
return log_warning_errno(r, "link_config: could not get ethtool features for %s", ifname);
sfeatures = alloca0(sizeof(struct ethtool_sfeatures) + DIV_ROUND_UP(strings->len, 32U) * sizeof(sfeatures->features[0]));
sfeatures->cmd = ETHTOOL_SFEATURES;
sfeatures->size = DIV_ROUND_UP(strings->len, 32U);
for (i = 0; i < _NET_DEV_FEAT_MAX; i++) {
if (features[i] != -1) {
r = find_feature_index(strings, netdev_feature_table[i]);
if (r < 0) {
log_warning_errno(r, "link_config: could not find feature: %s", netdev_feature_table[i]);
continue;
}
block = r / 32;
bit = r % 32;
sfeatures->features[block].valid |= 1 << bit;
if (features[i])
sfeatures->features[block].requested |= 1 << bit;
else
sfeatures->features[block].requested &= ~(1 << bit);
}
}
ifr.ifr_data = (void *) sfeatures;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return log_warning_errno(r, "link_config: could not set ethtool features for %s", ifname);
return 0;
}
static int get_glinksettings(int fd, struct ifreq *ifr, struct ethtool_link_usettings **g) {
struct ecmd {
struct ethtool_link_settings req;
__u32 link_mode_data[3 * ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
} ecmd = {
.req.cmd = ETHTOOL_GLINKSETTINGS,
};
struct ethtool_link_usettings *u;
unsigned offset;
int r;
/* The interaction user/kernel via the new API requires a small ETHTOOL_GLINKSETTINGS
handshake first to agree on the length of the link mode bitmaps. If kernel doesn't
agree with user, it returns the bitmap length it is expecting from user as a negative
length (and cmd field is 0). When kernel and user agree, kernel returns valid info in
all fields (ie. link mode length > 0 and cmd is ETHTOOL_GLINKSETTINGS). Based on
https://github.com/torvalds/linux/commit/3f1ac7a700d039c61d8d8b99f28d605d489a60cf
*/
ifr->ifr_data = (void *) &ecmd;
r = ioctl(fd, SIOCETHTOOL, ifr);
if (r < 0)
return -errno;
if (ecmd.req.link_mode_masks_nwords >= 0 || ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
return -EOPNOTSUPP;
ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
ifr->ifr_data = (void *) &ecmd;
r = ioctl(fd, SIOCETHTOOL, ifr);
if (r < 0)
return -errno;
if (ecmd.req.link_mode_masks_nwords <= 0 || ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
return -EOPNOTSUPP;
u = new0(struct ethtool_link_usettings , 1);
if (!u)
return -ENOMEM;
u->base = ecmd.req;
offset = 0;
memcpy(u->link_modes.supported, &ecmd.link_mode_data[offset], 4 * ecmd.req.link_mode_masks_nwords);
offset += ecmd.req.link_mode_masks_nwords;
memcpy(u->link_modes.advertising, &ecmd.link_mode_data[offset], 4 * ecmd.req.link_mode_masks_nwords);
offset += ecmd.req.link_mode_masks_nwords;
memcpy(u->link_modes.lp_advertising, &ecmd.link_mode_data[offset], 4 * ecmd.req.link_mode_masks_nwords);
*g = u;
return 0;
}
static int get_gset(int fd, struct ifreq *ifr, struct ethtool_link_usettings **u) {
struct ethtool_link_usettings *e;
struct ethtool_cmd ecmd = {
.cmd = ETHTOOL_GSET,
};
int r;
ifr->ifr_data = (void *) &ecmd;
r = ioctl(fd, SIOCETHTOOL, ifr);
if (r < 0)
return -errno;
e = new0(struct ethtool_link_usettings, 1);
if (!e)
return -ENOMEM;
e->base.cmd = ETHTOOL_GSET;
e->base.link_mode_masks_nwords = 1;
e->base.speed = ethtool_cmd_speed(&ecmd);
e->base.duplex = ecmd.duplex;
e->base.port = ecmd.port;
e->base.phy_address = ecmd.phy_address;
e->base.autoneg = ecmd.autoneg;
e->base.mdio_support = ecmd.mdio_support;
e->link_modes.supported[0] = ecmd.supported;
e->link_modes.advertising[0] = ecmd.advertising;
e->link_modes.lp_advertising[0] = ecmd.lp_advertising;
*u = e;
return 0;
}
static int set_slinksettings(int fd, struct ifreq *ifr, const struct ethtool_link_usettings *u) {
struct {
struct ethtool_link_settings req;
__u32 link_mode_data[3 * ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
} ecmd = {};
unsigned int offset;
int r;
if (u->base.cmd != ETHTOOL_GLINKSETTINGS || u->base.link_mode_masks_nwords <= 0)
return -EINVAL;
ecmd.req = u->base;
ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
offset = 0;
memcpy(&ecmd.link_mode_data[offset], u->link_modes.supported, 4 * ecmd.req.link_mode_masks_nwords);
offset += ecmd.req.link_mode_masks_nwords;
memcpy(&ecmd.link_mode_data[offset], u->link_modes.advertising, 4 * ecmd.req.link_mode_masks_nwords);
offset += ecmd.req.link_mode_masks_nwords;
memcpy(&ecmd.link_mode_data[offset], u->link_modes.lp_advertising, 4 * ecmd.req.link_mode_masks_nwords);
ifr->ifr_data = (void *) &ecmd;
r = ioctl(fd, SIOCETHTOOL, ifr);
if (r < 0)
return -errno;
return 0;
}
static int set_sset(int fd, struct ifreq *ifr, const struct ethtool_link_usettings *u) {
struct ethtool_cmd ecmd = {
.cmd = ETHTOOL_SSET,
};
int r;
if (u->base.cmd != ETHTOOL_GSET || u->base.link_mode_masks_nwords <= 0)
return -EINVAL;
ecmd.supported = u->link_modes.supported[0];
ecmd.advertising = u->link_modes.advertising[0];
ecmd.lp_advertising = u->link_modes.lp_advertising[0];
ethtool_cmd_speed_set(&ecmd, u->base.speed);
ecmd.duplex = u->base.duplex;
ecmd.port = u->base.port;
ecmd.phy_address = u->base.phy_address;
ecmd.autoneg = u->base.autoneg;
ecmd.mdio_support = u->base.mdio_support;
ecmd.eth_tp_mdix = u->base.eth_tp_mdix;
ecmd.eth_tp_mdix_ctrl = u->base.eth_tp_mdix_ctrl;
ifr->ifr_data = (void *) &ecmd;
r = ioctl(fd, SIOCETHTOOL, ifr);
if (r < 0)
return -errno;
return 0;
}
/* If autonegotiation is disabled, the speed and duplex represent the fixed link
* mode and are writable if the driver supports multiple link modes. If it is
* enabled then they are read-only. If the link is up they represent the negotiated
* link mode; if the link is down, the speed is 0, %SPEED_UNKNOWN or the highest
* enabled speed and @duplex is %DUPLEX_UNKNOWN or the best enabled duplex mode.
*/
int ethtool_set_glinksettings(int *fd, const char *ifname, struct link_config *link) {
_cleanup_free_ struct ethtool_link_usettings *u = NULL;
struct ifreq ifr = {};
int r;
if (link->autonegotiation != 0) {
log_info("link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.");
return 0;
}
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0)
return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = get_glinksettings(*fd, &ifr, &u);
if (r < 0) {
r = get_gset(*fd, &ifr, &u);
if (r < 0)
return log_warning_errno(r, "link_config: Cannot get device settings for %s : %m", ifname);
}
if (link->speed)
u->base.speed = DIV_ROUND_UP(link->speed, 1000000);
if (link->duplex != _DUP_INVALID)
u->base.duplex = link->duplex;
if (link->port != _NET_DEV_PORT_INVALID)
u->base.port = link->port;
u->base.autoneg = link->autonegotiation;
if (link->advertise) {
uint32_t advertise[ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32] = {};
advertise[0] = link->advertise;
memcpy(&u->link_modes.advertising, advertise, ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NBYTES);
}
if (u->base.cmd == ETHTOOL_GLINKSETTINGS)
r = set_slinksettings(*fd, &ifr, u);
else
r = set_sset(*fd, &ifr, u);
if (r < 0)
return log_warning_errno(r, "link_config: Cannot set device settings for %s : %m", ifname);
return r;
}
int ethtool_set_channels(int *fd, const char *ifname, netdev_channels *channels) {
struct ethtool_channels ecmd = {
.cmd = ETHTOOL_GCHANNELS
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
bool need_update = false;
int r;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0)
return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
if (channels->rx_count_set && ecmd.rx_count != channels->rx_count) {
ecmd.rx_count = channels->rx_count;
need_update = true;
}
if (channels->tx_count_set && ecmd.tx_count != channels->tx_count) {
ecmd.tx_count = channels->tx_count;
need_update = true;
}
if (channels->other_count_set && ecmd.other_count != channels->other_count) {
ecmd.other_count = channels->other_count;
need_update = true;
}
if (channels->combined_count_set && ecmd.combined_count != channels->combined_count) {
ecmd.combined_count = channels->combined_count;
need_update = true;
}
if (need_update) {
ecmd.cmd = ETHTOOL_SCHANNELS;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
}
return 0;
}
int config_parse_advertise(const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
link_config *config = data;
NetDevAdvertise mode, a = 0;
const char *p;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
if (isempty(rvalue)) {
/* Empty string resets the value. */
config->advertise = 0;
return 0;
}
for (p = rvalue;;) {
_cleanup_free_ char *w = NULL;
r = extract_first_word(&p, &w, NULL, 0);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to split advertise modes '%s', ignoring: %m", rvalue);
break;
}
if (r == 0)
break;
mode = advertise_from_string(w);
if (mode == _NET_DEV_ADVERTISE_INVALID) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse advertise mode, ignoring: %s", w);
continue;
}
a |= mode;
}
config->advertise |= a;
return 0;
}
int ethtool_set_channels(int *fd, const char *ifname, netdev_channels *channels) {
struct ethtool_channels ecmd = {
.cmd = ETHTOOL_GCHANNELS
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
bool need_update = false;
int r;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0)
return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
if (channels->rx_count_set && ecmd.rx_count != channels->rx_count) {
ecmd.rx_count = channels->rx_count;
need_update = true;
}
if (channels->tx_count_set && ecmd.tx_count != channels->tx_count) {
ecmd.tx_count = channels->tx_count;
need_update = true;
}
if (channels->other_count_set && ecmd.other_count != channels->other_count) {
ecmd.other_count = channels->other_count;
need_update = true;
}
if (channels->combined_count_set && ecmd.combined_count != channels->combined_count) {
ecmd.combined_count = channels->combined_count;
need_update = true;
}
if (need_update) {
ecmd.cmd = ETHTOOL_SCHANNELS;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
}
return 0;
}
int config_parse_advertise(const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
link_config *config = data;
const char *p;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
if (isempty(rvalue)) {
/* Empty string resets the value. */
zero(config->advertise);
return 0;
}
for (p = rvalue;;) {
_cleanup_free_ char *w = NULL;
enum ethtool_link_mode_bit_indices mode;
r = extract_first_word(&p, &w, NULL, 0);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to split advertise modes '%s', ignoring: %m", rvalue);
break;
}
if (r == 0)
break;
mode = ethtool_link_mode_bit_from_string(w);
/* We reuse the kernel provided enum which does not contain negative value. So, the cast
* below is mandatory. Otherwise, the check below always passes and access an invalid address. */
if ((int) mode < 0) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse advertise mode, ignoring: %s", w);
continue;
}
config->advertise[mode / 32] |= 1UL << (mode % 32);
}
return 0;
}