This parameter allows specifying any non-NetVSC interface to use with tap
sub-devices for development purposes.
Signed-off-by: Adrien Mazarguil <adrien.mazarg...@6wind.com>
---
doc/guides/nics/vdev_netvsc.rst | 5 +++++
drivers/net/vdev_netvsc/vdev_netvsc.c | 27 +++++++++++++++++++--------
2 files changed, 24 insertions(+), 8 deletions(-)
diff --git a/doc/guides/nics/vdev_netvsc.rst b/doc/guides/nics/vdev_netvsc.rst
index 73a63e552..a0417b5ef 100644
--- a/doc/guides/nics/vdev_netvsc.rst
+++ b/doc/guides/nics/vdev_netvsc.rst
@@ -107,5 +107,10 @@ The following device parameters are supported:
Same as ``iface`` except a suitable NetVSC interface is located using its
MAC address.
+- ``force`` [int]
+
+ If nonzero, forces the use of specified interfaces even if not detected as
+ NetVSC.
+
Not specifying either ``iface`` or ``mac`` makes this PMD attach itself to
all NetVSC interfaces found on the system.
diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
b/drivers/net/vdev_netvsc/vdev_netvsc.c
index 738196e75..5e426adc0 100644
--- a/drivers/net/vdev_netvsc/vdev_netvsc.c
+++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
@@ -63,6 +63,7 @@
#define VDEV_NETVSC_DRIVER net_vdev_netvsc
#define VDEV_NETVSC_ARG_IFACE "iface"
#define VDEV_NETVSC_ARG_MAC "mac"
+#define VDEV_NETVSC_ARG_FORCE "force"
#define VDEV_NETVSC_PROBE_MS 1000
#define NETVSC_CLASS_ID "{f8615163-df3e-46c5-913f-f2d2f965ed0e}"
@@ -405,6 +406,9 @@ vdev_netvsc_alarm(__rte_unused void *arg)
* - struct rte_kvargs *kvargs:
* Device arguments provided to current driver instance.
*
+ * - int force:
+ * Accept specified interface even if not detected as NetVSC.
+ *
* - unsigned int specified:
* Number of specific netdevices provided as device arguments.
*
@@ -422,6 +426,7 @@ vdev_netvsc_netvsc_probe(const struct if_nameindex *iface,
{
const char *name = va_arg(ap, const char *);
struct rte_kvargs *kvargs = va_arg(ap, struct rte_kvargs *);
+ int force = va_arg(ap, int);
unsigned int specified = va_arg(ap, unsigned int);
unsigned int *matched = va_arg(ap, unsigned int *);
unsigned int i;
@@ -480,10 +485,11 @@ vdev_netvsc_netvsc_probe(const struct if_nameindex *iface,
if (!specified)
return 0;
PMD_DRV_LOG(WARNING,
- "interface \"%s\" (index %u) is not NetVSC,"
- " skipping",
- iface->if_name, iface->if_index);
- return 0;
+ "interface \"%s\" (index %u) is not NetVSC, %s",
+ iface->if_name, iface->if_index,
+ force ? "using anyway (forced)" : "skipping");
+ if (!force)
+ return 0;
}
/* Create interface context. */
ctx = calloc(1, sizeof(*ctx));
@@ -610,6 +616,7 @@ vdev_netvsc_vdev_probe(struct rte_vdev_device *dev)
static const char *const vdev_netvsc_arg[] = {
VDEV_NETVSC_ARG_IFACE,
VDEV_NETVSC_ARG_MAC,
+ VDEV_NETVSC_ARG_FORCE,
NULL,
};
const char *name = rte_vdev_device_name(dev);
@@ -618,6 +625,7 @@ vdev_netvsc_vdev_probe(struct rte_vdev_device *dev)
vdev_netvsc_arg);
unsigned int specified = 0;
unsigned int matched = 0;
+ int force = 0;
unsigned int i;
int ret;
@@ -631,14 +639,16 @@ vdev_netvsc_vdev_probe(struct rte_vdev_device *dev)
for (i = 0; i != kvargs->count; ++i) {
const struct rte_kvargs_pair *pair = &kvargs->pairs[i];
- if (!strcmp(pair->key, VDEV_NETVSC_ARG_IFACE) ||
- !strcmp(pair->key, VDEV_NETVSC_ARG_MAC))
+ if (!strcmp(pair->key, VDEV_NETVSC_ARG_FORCE))
+ force = !!atoi(pair->value);
+ else if (!strcmp(pair->key, VDEV_NETVSC_ARG_IFACE) ||
+ !strcmp(pair->key, VDEV_NETVSC_ARG_MAC))
++specified;
}
rte_eal_alarm_cancel(vdev_netvsc_alarm, NULL);
/* Gather interfaces. */
ret = vdev_netvsc_foreach_iface(vdev_netvsc_netvsc_probe, name, kvargs,
- specified, &matched);
+ force, specified, &matched);
if (ret < 0)
goto error;
if (matched < specified)
@@ -697,7 +707,8 @@ RTE_PMD_REGISTER_VDEV(VDEV_NETVSC_DRIVER, vdev_netvsc_vdev);
RTE_PMD_REGISTER_ALIAS(VDEV_NETVSC_DRIVER, eth_vdev_netvsc);
RTE_PMD_REGISTER_PARAM_STRING(net_vdev_netvsc,
VDEV_NETVSC_ARG_IFACE "=<string> "
- VDEV_NETVSC_ARG_MAC "=<string>");
+ VDEV_NETVSC_ARG_MAC "=<string> "
+ VDEV_NETVSC_ARG_FORCE "=<int>");
/** Initialize driver log type. */
static void
--
2.11.0
