diff options
Diffstat (limited to 'src/plugins/af_xdp/output.c')
| -rw-r--r-- | src/plugins/af_xdp/output.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/plugins/af_xdp/output.c b/src/plugins/af_xdp/output.c index d1500a63cbb..8136d918a75 100644 --- a/src/plugins/af_xdp/output.c +++ b/src/plugins/af_xdp/output.c @@ -1,4 +1,3 @@ -#include <poll.h> #include <string.h> #include <vlib/vlib.h> #include <vlib/unix/unix.h> @@ -101,11 +100,19 @@ af_xdp_device_output_tx_db (vlib_main_t * vm, if (xsk_ring_prod__needs_wakeup (&txq->tx)) { - struct pollfd fd = { .fd = txq->xsk_fd, .events = POLLIN | POLLOUT }; - int ret = poll (&fd, 1, 0); + const struct msghdr msg = {}; + int ret; + /* On tx, xsk socket will only tx up to TX_BATCH_SIZE, as defined in + * kernel net/xdp/xsk.c. Unfortunately we do not know how much this is, + * our only option is to retry until everything is sent... */ + do + { + ret = sendmsg (txq->xsk_fd, &msg, MSG_DONTWAIT); + } + while (ret < 0 && EAGAIN == errno); if (PREDICT_FALSE (ret < 0)) { - /* something bad is happening */ + /* not EAGAIN: something bad is happening */ vlib_error_count (vm, node->node_index, AF_XDP_TX_ERROR_SYSCALL_FAILURES, 1); af_xdp_device_error (ad, "tx poll() failed"); |