devices: refactor fanout support
Type: refactor
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Change-Id: I9e68ecb91f6433f68a8a87dd066f3e369f25a3c9
diff --git a/src/vnet/devices/af_packet/af_packet.c b/src/vnet/devices/af_packet/af_packet.c
index fd2f6fc..10b0ff2 100644
--- a/src/vnet/devices/af_packet/af_packet.c
+++ b/src/vnet/devices/af_packet/af_packet.c
@@ -191,8 +191,7 @@
static int
create_packet_v3_sock (int host_if_index, tpacket_req3_t *rx_req,
tpacket_req3_t *tx_req, int *fd, af_packet_ring_t *ring,
- u32 fanout_id, u8 is_fanout,
- af_packet_if_flags_t *flags)
+ u32 fanout_id, af_packet_if_flags_t *flags)
{
af_packet_main_t *apm = &af_packet_main;
struct sockaddr_ll sll;
@@ -281,30 +280,34 @@
}
#endif
- if (is_fanout)
+ if (rx_req)
{
- int fanout = ((fanout_id & 0xffff) | ((PACKET_FANOUT_HASH) << 16));
- if (setsockopt (*fd, SOL_PACKET, PACKET_FANOUT, &fanout,
- sizeof (fanout)) < 0)
+ if (*flags & AF_PACKET_IF_FLAGS_FANOUT)
+ {
+ int fanout = ((fanout_id & 0xffff) | ((PACKET_FANOUT_HASH) << 16));
+ if (setsockopt (*fd, SOL_PACKET, PACKET_FANOUT, &fanout,
+ sizeof (fanout)) < 0)
+ {
+ // remove the flag
+ *flags &= ~AF_PACKET_IF_FLAGS_FANOUT;
+ vlib_log_err (apm->log_class,
+ "Failed to set fanout options: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+ }
+
+ if (setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz) < 0)
{
vlib_log_err (apm->log_class,
- "Failed to set fanout options: %s (errno %d)",
+ "Failed to set packet rx ring options: %s (errno %d)",
strerror (errno), errno);
ret = VNET_API_ERROR_SYSCALL_ERROR_1;
goto error;
}
}
- if (rx_req)
- if (setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz) < 0)
- {
- vlib_log_err (apm->log_class,
- "Failed to set packet rx ring options: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
if (tx_req)
if (setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz) < 0)
{
@@ -341,7 +344,7 @@
af_packet_queue_init (vlib_main_t *vm, af_packet_if_t *apif,
af_packet_create_if_arg_t *arg,
af_packet_queue_t *rx_queue, af_packet_queue_t *tx_queue,
- u8 queue_id, u8 is_fanout)
+ u8 queue_id)
{
af_packet_main_t *apm = &af_packet_main;
tpacket_req3_t *rx_req = 0;
@@ -395,9 +398,8 @@
if (rx_queue || tx_queue)
{
- ret =
- create_packet_v3_sock (apif->host_if_index, rx_req, tx_req, &fd, &ring,
- apif->dev_instance, is_fanout, &arg->flags);
+ ret = create_packet_v3_sock (apif->host_if_index, rx_req, tx_req, &fd,
+ &ring, apif->dev_instance, &arg->flags);
if (ret != 0)
goto error;
@@ -458,7 +460,10 @@
u16 nq = clib_min (args->num_rxqs, args->num_txqs);
u16 i = 0;
int ret = 0;
- u8 is_fanout = (args->num_rxqs > 1) ? 1 : 0;
+
+ // enable fanout feature for multi-rxqs
+ if (args->num_rxqs > 1)
+ args->flags |= AF_PACKET_IF_FLAGS_FANOUT;
vec_validate (apif->rx_queues, args->num_rxqs - 1);
vec_validate (apif->tx_queues, args->num_txqs - 1);
@@ -467,8 +472,7 @@
{
rx_queue = vec_elt_at_index (apif->rx_queues, i);
tx_queue = vec_elt_at_index (apif->tx_queues, i);
- ret = af_packet_queue_init (vm, apif, args, rx_queue, tx_queue, i,
- is_fanout);
+ ret = af_packet_queue_init (vm, apif, args, rx_queue, tx_queue, i);
if (ret != 0)
goto error;
}
@@ -478,8 +482,7 @@
for (; i < args->num_rxqs; i++)
{
rx_queue = vec_elt_at_index (apif->rx_queues, i);
- ret =
- af_packet_queue_init (vm, apif, args, rx_queue, 0, i, is_fanout);
+ ret = af_packet_queue_init (vm, apif, args, rx_queue, 0, i);
if (ret != 0)
goto error;
}
@@ -489,7 +492,7 @@
for (; i < args->num_txqs; i++)
{
tx_queue = vec_elt_at_index (apif->tx_queues, i);
- ret = af_packet_queue_init (vm, apif, args, 0, tx_queue, i, 0);
+ ret = af_packet_queue_init (vm, apif, args, 0, tx_queue, i);
if (ret != 0)
goto error;
}
@@ -646,6 +649,9 @@
af_packet_set_rx_queues (vm, apif);
af_packet_set_tx_queues (vm, apif);
+ if (arg->flags & AF_PACKET_IF_FLAGS_FANOUT)
+ apif->is_fanout_enabled = 1;
+
apif->is_qdisc_bypass_enabled =
(arg->flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS);