[dpdk-dev] [PATCH v3 4/4] net/tap: set MTU on the remote
Pascal Mazon
pascal.mazon at 6wind.com
Wed Mar 8 11:06:47 CET 2017
Signed-off-by: Pascal Mazon <pascal.mazon at 6wind.com>
---
drivers/net/tap/rte_eth_tap.c | 29 +++++++++++++++++++++++------
1 file changed, 23 insertions(+), 6 deletions(-)
diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 05ed0a131d63..9edf6b355a47 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -839,9 +839,8 @@ tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
}
static int
-tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+tap_netdev_mtu_set(const char *iface, uint16_t mtu)
{
- struct pmd_internals *pmd = dev->data->dev_private;
struct ifreq ifr;
int err, s;
@@ -849,15 +848,15 @@ tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
if (s < 0) {
RTE_LOG(ERR, PMD,
"Unable to get a socket for %s to set flags: %s\n",
- pmd->name, strerror(errno));
+ iface, strerror(errno));
return -1;
}
memset(&ifr, 0, sizeof(ifr));
- snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name);
+ snprintf(ifr.ifr_name, IFNAMSIZ, "%s", iface);
err = ioctl(s, SIOCGIFMTU, &ifr);
if (err < 0) {
RTE_LOG(WARNING, PMD, "Unable to get %s device MTU: %s\n",
- pmd->name, strerror(errno));
+ iface, strerror(errno));
close(s);
return -1;
}
@@ -865,11 +864,29 @@ tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
err = ioctl(s, SIOCSIFMTU, &ifr);
if (err < 0) {
RTE_LOG(WARNING, PMD, "Unable to set %s mtu %d: %s\n",
- pmd->name, mtu, strerror(errno));
+ iface, mtu, strerror(errno));
close(s);
return -1;
}
close(s);
+ return 0;
+}
+
+static int
+tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+ struct pmd_internals *pmd = dev->data->dev_private;
+ int err;
+
+ /* First try to set mtu on the remote */
+ if (pmd->remote_if_index) {
+ err = tap_netdev_mtu_set(pmd->remote_iface, mtu);
+ if (err < 0)
+ return err;
+ }
+ err = tap_netdev_mtu_set(pmd->name, mtu);
+ if (err < 0)
+ return err;
dev->data->mtu = mtu;
return 0;
}
--
2.8.0.rc0
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