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-rw-r--r--vnet/vnet/devices/af_packet/af_packet.c2
-rw-r--r--vnet/vnet/devices/af_packet/device.c39
2 files changed, 32 insertions, 9 deletions
diff --git a/vnet/vnet/devices/af_packet/af_packet.c b/vnet/vnet/devices/af_packet/af_packet.c
index b41eaf3ba82..e3ed3857982 100644
--- a/vnet/vnet/devices/af_packet/af_packet.c
+++ b/vnet/vnet/devices/af_packet/af_packet.c
@@ -115,7 +115,7 @@ create_packet_v2_sock(u8 * name, tpacket_req_t * rx_req, tpacket_req_t * tx_req,
int opt = 1;
if ((err = setsockopt(*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof(opt))) < 0)
{
- DBG_SOCK("Failed to set rx packet interface version");
+ DBG_SOCK("Failed to set packet tx ring error handling option");
ret = VNET_API_ERROR_SYSCALL_ERROR_1;
goto error;
}
diff --git a/vnet/vnet/devices/af_packet/device.c b/vnet/vnet/devices/af_packet/device.c
index 0671d9e247d..f572632ce37 100644
--- a/vnet/vnet/devices/af_packet/device.c
+++ b/vnet/vnet/devices/af_packet/device.c
@@ -26,8 +26,11 @@
#include <vnet/devices/af_packet/af_packet.h>
-#define foreach_af_packet_tx_func_error \
-_(FRAME_NOT_READY, "tx frame not ready")
+#define foreach_af_packet_tx_func_error \
+_(FRAME_NOT_READY, "tx frame not ready") \
+_(TXRING_EAGAIN, "tx sendto temporary failure") \
+_(TXRING_FATAL, "tx sendto fatal failure") \
+_(TXRING_OVERRUN, "tx ring overrun")
typedef enum {
#define _(f,s) AF_PACKET_TX_ERROR_##f,
@@ -96,7 +99,7 @@ af_packet_interface_tx (vlib_main_t * vm,
tph = (struct tpacket2_hdr *) (block_start + tx_frame * frame_size);
- if(tph->tp_status & (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING))
+ if (PREDICT_FALSE(tph->tp_status & (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING)))
{
frame_not_ready++;
goto next;
@@ -116,21 +119,41 @@ af_packet_interface_tx (vlib_main_t * vm,
tph->tp_status = TP_STATUS_SEND_REQUEST;
n_sent++;
next:
+ /* check if we've exhausted the ring */
+ if (PREDICT_FALSE(frame_not_ready + n_sent == frame_num))
+ break;
+
tx_frame = (tx_frame + 1) % frame_num;
}
CLIB_MEMORY_BARRIER();
- if (n_sent)
+ if (PREDICT_TRUE(n_sent))
{
apif->next_tx_frame = tx_frame;
- if (sendto(apif->fd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1)
- clib_unix_error("tx sendto failure");
+
+ if (PREDICT_FALSE(sendto(apif->fd, NULL, 0,
+ MSG_DONTWAIT, NULL, 0) == -1))
+ {
+ /* Uh-oh, drop & move on, but count whether it was fatal or not.
+ * Note that we have no reliable way to properly determine the
+ * disposition of the packets we just enqueued for delivery.
+ */
+ vlib_error_count (vm, node->node_index,
+ unix_error_is_fatal(errno) ?
+ AF_PACKET_TX_ERROR_TXRING_FATAL :
+ AF_PACKET_TX_ERROR_TXRING_EAGAIN,
+ n_sent);
+ }
}
- if (frame_not_ready)
+ if (PREDICT_FALSE(frame_not_ready))
vlib_error_count (vm, node->node_index, AF_PACKET_TX_ERROR_FRAME_NOT_READY,
- frame_not_ready);
+ frame_not_ready);
+
+ if (PREDICT_FALSE(frame_not_ready + n_sent == frame_num))
+ vlib_error_count (vm, node->node_index, AF_PACKET_TX_ERROR_TXRING_OVERRUN,
+ n_left);
vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
return frame->n_vectors;