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path: root/src/udev/net/ethtool-util.c
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Diffstat (limited to 'src/udev/net/ethtool-util.c')
-rw-r--r--src/udev/net/ethtool-util.c123
1 files changed, 120 insertions, 3 deletions
diff --git a/src/udev/net/ethtool-util.c b/src/udev/net/ethtool-util.c
index c00ff79123..708a665576 100644
--- a/src/udev/net/ethtool-util.c
+++ b/src/udev/net/ethtool-util.c
@@ -25,6 +25,7 @@
#include "conf-parser.h"
#include "ethtool-util.h"
#include "log.h"
+#include "socket-util.h"
#include "string-table.h"
#include "strxcpyx.h"
#include "util.h"
@@ -46,15 +47,22 @@ static const char* const wol_table[_WOL_MAX] = {
DEFINE_STRING_TABLE_LOOKUP(wol, WakeOnLan);
DEFINE_CONFIG_PARSE_ENUM(config_parse_wol, wol, WakeOnLan, "Failed to parse WakeOnLan setting");
+static const char* const netdev_feature_table[_NET_DEV_FEAT_MAX] = {
+ [NET_DEV_FEAT_GSO] = "tx-generic-segmentation",
+ [NET_DEV_FEAT_GRO] = "rx-gro",
+ [NET_DEV_FEAT_LRO] = "rx-lro",
+ [NET_DEV_FEAT_TSO] = "tx-tcp-segmentation",
+ [NET_DEV_FEAT_UFO] = "tx-udp-fragmentation",
+};
+
int ethtool_connect(int *ret) {
int fd;
assert_return(ret, -EINVAL);
- fd = socket(PF_INET, SOCK_DGRAM, 0);
+ fd = socket_ioctl_fd();
if (fd < 0)
- return -errno;
-
+ return fd;
*ret = fd;
return 0;
@@ -206,3 +214,112 @@ int ethtool_set_wol(int *fd, const char *ifname, WakeOnLan wol) {
return 0;
}
+
+static int ethtool_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 = strings;
+ strings = NULL;
+
+ 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, NetDevFeature *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 = ethtool_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_gstrings) + 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;
+}