diff options
Diffstat (limited to 'src/vnet/devices/af_packet/af_packet.c')
| -rw-r--r-- | src/vnet/devices/af_packet/af_packet.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/vnet/devices/af_packet/af_packet.c b/src/vnet/devices/af_packet/af_packet.c index ba6bf3d5a46..2cc0cc70bca 100644 --- a/src/vnet/devices/af_packet/af_packet.c +++ b/src/vnet/devices/af_packet/af_packet.c @@ -83,11 +83,32 @@ af_packet_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, clib_error_free (error); return VNET_API_ERROR_SYSCALL_ERROR_1; } + else + apif->host_mtu = hi->max_packet_bytes; } return 0; } +static int +af_packet_read_mtu (af_packet_if_t *apif) +{ + af_packet_main_t *apm = &af_packet_main; + clib_error_t *error; + u8 *s; + s = format (0, "/sys/class/net/%s/mtu%c", apif->host_if_name, 0); + error = clib_sysfs_read ((char *) s, "%d", &apif->host_mtu); + vec_free (s); + if (error) + { + vlib_log_err (apm->log_class, "sysfs read failed to get MTU: %U", + format_clib_error, error); + clib_error_free (error); + return VNET_API_ERROR_SYSCALL_ERROR_1; + } + return 0; +} + static clib_error_t * af_packet_fd_read_ready (clib_file_t * uf) { @@ -338,6 +359,10 @@ af_packet_create_if (vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set, apif->next_tx_frame = 0; apif->next_rx_frame = 0; + ret = af_packet_read_mtu (apif); + if (ret != 0) + goto error; + if (tm->n_vlib_mains > 1) clib_spinlock_init (&apif->lockp); |