* [PATCH v2 1/2] examples/l2fwd: Add new option to enable/disable MAC addresses updating
2016-09-23 13:50 [PATCH v2 0/2] examples/l2fwd: Add option to enable/disable MAC addresses updating Maxime Coquelin
@ 2016-09-23 13:50 ` Maxime Coquelin
2016-09-23 13:50 ` [PATCH v2 2/2] doc: l2fwd: document new --[no-]mac-updating option Maxime Coquelin
2016-10-13 7:26 ` [PATCH v2 0/2] examples/l2fwd: Add option to enable/disable MAC addresses updating Thomas Monjalon
2 siblings, 0 replies; 7+ messages in thread
From: Maxime Coquelin @ 2016-09-23 13:50 UTC (permalink / raw)
To: bruce.richardson, pablo.de.lara.guarch, john.mcnamara, dev
Cc: maxime.coquelin
l2fwd could be useful for testing virtual devices without the need
of physical ones.
To achieve this, this patch adds a new option to enable/disable the
MAC addresses updating done at forwarding time: --[no-]mac-updating
By default, MAC address updating remains enabled, to keep consistency
with previous usage.
Acked-by: John McNamara <john.mcnamara@intel.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
examples/l2fwd/main.c | 39 +++++++++++++++++++++++++++++----------
1 file changed, 29 insertions(+), 10 deletions(-)
diff --git a/examples/l2fwd/main.c b/examples/l2fwd/main.c
index 3827aa4..b2f5851 100644
--- a/examples/l2fwd/main.c
+++ b/examples/l2fwd/main.c
@@ -73,6 +73,9 @@
static volatile bool force_quit;
+/* MAC updating enabled by default */
+static int mac_updating = 1;
+
#define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
#define NB_MBUF 8192
@@ -185,23 +188,32 @@ print_stats(void)
}
static void
-l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
+l2fwd_mac_updating(struct rte_mbuf *m, unsigned dest_portid)
{
struct ether_hdr *eth;
void *tmp;
- unsigned dst_port;
- int sent;
- struct rte_eth_dev_tx_buffer *buffer;
- dst_port = l2fwd_dst_ports[portid];
eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
/* 02:00:00:00:00:xx */
tmp = ð->d_addr.addr_bytes[0];
- *((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);
+ *((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dest_portid << 40);
/* src addr */
- ether_addr_copy(&l2fwd_ports_eth_addr[dst_port], ð->s_addr);
+ ether_addr_copy(&l2fwd_ports_eth_addr[dest_portid], ð->s_addr);
+}
+
+static void
+l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
+{
+ unsigned dst_port;
+ int sent;
+ struct rte_eth_dev_tx_buffer *buffer;
+
+ dst_port = l2fwd_dst_ports[portid];
+
+ if (mac_updating)
+ l2fwd_mac_updating(m, dst_port);
buffer = tx_buffer[dst_port];
sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
@@ -321,7 +333,11 @@ l2fwd_usage(const char *prgname)
printf("%s [EAL options] -- -p PORTMASK [-q NQ]\n"
" -p PORTMASK: hexadecimal bitmask of ports to configure\n"
" -q NQ: number of queue (=ports) per lcore (default is 1)\n"
- " -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n",
+ " -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n"
+ " --[no-]mac-updating: Enable or disable MAC addresses updating (enabled by default)\n"
+ " When enabled:\n"
+ " - The source MAC address is replaced by the TX port MAC address\n"
+ " - The destination MAC address is replaced by 02:00:00:00:00:TX_PORT_ID\n",
prgname);
}
@@ -385,6 +401,8 @@ l2fwd_parse_args(int argc, char **argv)
int option_index;
char *prgname = argv[0];
static struct option lgopts[] = {
+ { "mac-updating", no_argument, &mac_updating, 1},
+ { "no-mac-updating", no_argument, &mac_updating, 0},
{NULL, 0, 0, 0}
};
@@ -427,8 +445,7 @@ l2fwd_parse_args(int argc, char **argv)
/* long options */
case 0:
- l2fwd_usage(prgname);
- return -1;
+ break;
default:
l2fwd_usage(prgname);
@@ -541,6 +558,8 @@ main(int argc, char **argv)
if (ret < 0)
rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");
+ printf("MAC updating %s\n", mac_updating ? "enabled" : "disabled");
+
/* convert to number of cycles */
timer_period *= rte_get_timer_hz();
--
2.7.4
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v2 2/2] doc: l2fwd: document new --[no-]mac-updating option
2016-09-23 13:50 [PATCH v2 0/2] examples/l2fwd: Add option to enable/disable MAC addresses updating Maxime Coquelin
2016-09-23 13:50 ` [PATCH v2 1/2] examples/l2fwd: Add new " Maxime Coquelin
@ 2016-09-23 13:50 ` Maxime Coquelin
2016-09-26 10:33 ` Mcnamara, John
2016-10-13 7:26 ` [PATCH v2 0/2] examples/l2fwd: Add option to enable/disable MAC addresses updating Thomas Monjalon
2 siblings, 1 reply; 7+ messages in thread
From: Maxime Coquelin @ 2016-09-23 13:50 UTC (permalink / raw)
To: bruce.richardson, pablo.de.lara.guarch, john.mcnamara, dev
Cc: maxime.coquelin
This patch documents the new l2fwd option, which provides a way to
disable the MAC addresses updating, enabling the use of l2fwd for
basic VM to VM communication.
Acked-by: John McNamara <john.mcnamara@intel.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
doc/guides/sample_app_ug/img/l2_fwd_vm2vm.svg | 311 +++++++++++++++++++++
.../sample_app_ug/l2_forward_real_virtual.rst | 31 +-
2 files changed, 332 insertions(+), 10 deletions(-)
create mode 100644 doc/guides/sample_app_ug/img/l2_fwd_vm2vm.svg
diff --git a/doc/guides/sample_app_ug/img/l2_fwd_vm2vm.svg b/doc/guides/sample_app_ug/img/l2_fwd_vm2vm.svg
new file mode 100644
index 0000000..b84dcb2
--- /dev/null
+++ b/doc/guides/sample_app_ug/img/l2_fwd_vm2vm.svg
@@ -0,0 +1,311 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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diff --git a/doc/guides/sample_app_ug/l2_forward_real_virtual.rst b/doc/guides/sample_app_ug/l2_forward_real_virtual.rst
index a1c10c0..cf15d1c 100644
--- a/doc/guides/sample_app_ug/l2_forward_real_virtual.rst
+++ b/doc/guides/sample_app_ug/l2_forward_real_virtual.rst
@@ -50,17 +50,14 @@ performs L2 forwarding for each packet that is received on an RX_PORT.
The destination port is the adjacent port from the enabled portmask, that is,
if the first four ports are enabled (portmask 0xf),
ports 1 and 2 forward into each other, and ports 3 and 4 forward into each other.
-Also, the MAC addresses are affected as follows:
+Also, if MAC addresses updating is enabled, the MAC addresses are affected as follows:
* The source MAC address is replaced by the TX_PORT MAC address
* The destination MAC address is replaced by 02:00:00:00:00:TX_PORT_ID
-This application can be used to benchmark performance using a traffic-generator, as shown in the :numref:`figure_l2_fwd_benchmark_setup`.
-
-The application can also be used in a virtualized environment as shown in :numref:`figure_l2_fwd_virtenv_benchmark_setup`.
-
-The L2 Forwarding application can also be used as a starting point for developing a new application based on the DPDK.
+This application can be used to benchmark performance using a traffic-generator, as shown in the :numref:`figure_l2_fwd_benchmark_setup`,
+or in a virtualized environment as shown in :numref:`figure_l2_fwd_virtenv_benchmark_setup`.
.. _figure_l2_fwd_benchmark_setup:
@@ -68,13 +65,23 @@ The L2 Forwarding application can also be used as a starting point for developin
Performance Benchmark Setup (Basic Environment)
-
.. _figure_l2_fwd_virtenv_benchmark_setup:
.. figure:: img/l2_fwd_virtenv_benchmark_setup.*
Performance Benchmark Setup (Virtualized Environment)
+This application may be used for basic VM to VM communication as shown in :numref:`figure_l2_fwd_vm2vm`,
+when MAC addresses updating is disabled.
+
+.. _figure_l2_fwd_vm2vm:
+
+.. figure:: img/l2_fwd_vm2vm.*
+
+ Virtual Machine to Virtual Machine communication.
+
+The L2 Forwarding application can also be used as a starting point for developing a new application based on the DPDK.
+
.. _l2_fwd_vf_setup:
Virtual Function Setup Instructions
@@ -128,7 +135,7 @@ The application requires a number of command line options:
.. code-block:: console
- ./build/l2fwd [EAL options] -- -p PORTMASK [-q NQ]
+ ./build/l2fwd [EAL options] -- -p PORTMASK [-q NQ] --[no-]mac-updating
where,
@@ -136,7 +143,10 @@ where,
* q NQ: A number of queues (=ports) per lcore (default is 1)
-To run the application in linuxapp environment with 4 lcores, 16 ports and 8 RX queues per lcore, issue the command:
+* --[no-]mac-updating: Enable or disable MAC addresses updating (enabled by default).
+
+To run the application in linuxapp environment with 4 lcores, 16 ports and 8 RX queues per lcore and MAC address
+updating enabled, issue the command:
.. code-block:: console
@@ -415,7 +425,8 @@ Packets are read in a burst of size MAX_PKT_BURST.
The rte_eth_rx_burst() function writes the mbuf pointers in a local table and returns the number of available mbufs in the table.
Then, each mbuf in the table is processed by the l2fwd_simple_forward() function.
-The processing is very simple: process the TX port from the RX port, then replace the source and destination MAC addresses.
+The processing is very simple: process the TX port from the RX port, then replace the source and destination MAC addresses if MAC
+addresses updating is enabled.
.. note::
--
2.7.4
^ permalink raw reply related [flat|nested] 7+ messages in thread
