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authorSusant Sahani <ssahani@users.noreply.github.com>2016-08-30 20:22:04 +0530
committerLennart Poettering <lennart@poettering.net>2016-08-30 16:52:04 +0200
commit50725d10e3417fd357abe1df2f177b8458027ac7 (patch)
tree4f047ea153910172de4f2e782b4ad5ef6f2fd587 /src/udev/net/ethtool-util.c
parenta908cf0a126a332a209670ad5c769efa231fd002 (diff)
link : add support to configure Offload features (#4017)
This patch supports these features to be on or off Generic Segmentation Offload TCP Segmentation Offload UDP Segmentation Offload fixes #432
Diffstat (limited to 'src/udev/net/ethtool-util.c')
-rw-r--r--src/udev/net/ethtool-util.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/src/udev/net/ethtool-util.c b/src/udev/net/ethtool-util.c
index c00ff79123..5143eb5a9d 100644
--- a/src/udev/net/ethtool-util.c
+++ b/src/udev/net/ethtool-util.c
@@ -46,6 +46,12 @@ 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_TSO] = "tx-tcp-segmentation",
+ [NET_DEV_FEAT_UFO] = "tx-udp-fragmentation",
+};
+
int ethtool_connect(int *ret) {
int fd;
@@ -206,3 +212,108 @@ 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 ethtool_sset_info info = {
+ .cmd = ETHTOOL_GSSET_INFO,
+ .reserved = 0,
+ .sset_mask = 1ULL << stringset_id,
+ };
+ unsigned len;
+ int r;
+
+ ifr->ifr_data = (void *) &info;
+
+ r = ioctl(*fd, SIOCETHTOOL, ifr);
+ if (r < 0)
+ return -errno;
+
+ if (!info.sset_mask)
+ return -EINVAL;
+
+ len = 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;
+}