vdpa: Enable user to set mtu of the vdpa device
Implement mtu setting for vdpa device.
$ vdpa mgmtdev show
vdpasim_net:
supported_classes net
Add the device with specified mac address:
$ vdpa dev add name bar mgmtdev vdpasim_net mac 00:11:22:33:44:55
View the config after setting:
$ vdpa dev config show
bar: mac 00:11:22:33:44:55 link up link_announce false mtu 1500
Signed-off-by: Parav Pandit <parav@xxxxxxxxxx>
---
changelog:
v1->v2:
- use strcmp() instead of matches()
- added man page
---
man/man8/vdpa-dev.8 | 11 ++++++++++
vdpa/vdpa.c | 52 ++++++++++++++++++++++++++++++++++++---------
2 files changed, 53 insertions(+), 10 deletions(-)
diff --git a/man/man8/vdpa-dev.8 b/man/man8/vdpa-dev.8
index 5d3a3f26..5c5ac469 100644
--- a/man/man8/vdpa-dev.8
+++ b/man/man8/vdpa-dev.8
@@ -31,6 +31,7 @@ vdpa-dev \- vdpa device configuration
.I NAME
.B mgmtdev
.I MGMTDEV
+.RI "[ mac " MACADDR " ]"
.ti -8
.B vdpa dev del
@@ -63,6 +64,11 @@ Name of the new vdpa device to add.
.BI mgmtdev " MGMTDEV"
Name of the management device to use for device addition.
+.PP
+.BI mac " MACADDR"
+- specifies the mac address for the new vdpa device.
+This is applicable only for the network type of vdpa device. This is optional.
+
.SS vdpa dev del - Delete the vdpa device.
.PP
@@ -98,6 +104,11 @@ vdpa dev add name foo mgmtdev vdpa_sim_net
Add the vdpa device named foo on the management device vdpa_sim_net.
.RE
.PP
+vdpa dev add name foo mgmtdev vdpa_sim_net mac 00:11:22:33:44:55
+.RS 4
+Add the vdpa device named foo on the management device vdpa_sim_net with mac address of 00:11:22:33:44:55.
+.RE
+.PP
vdpa dev del foo
.RS 4
Delete the vdpa device named foo which was previously created.
diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c
index ba704254..63d464d1 100644
--- a/vdpa/vdpa.c
+++ b/vdpa/vdpa.c
@@ -4,6 +4,7 @@
#include <getopt.h>
#include <errno.h>
#include <linux/genetlink.h>
+#include <linux/if_ether.h>
#include <linux/vdpa.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_net.h>
@@ -20,6 +21,7 @@
#define VDPA_OPT_VDEV_MGMTDEV_HANDLE BIT(1)
#define VDPA_OPT_VDEV_NAME BIT(2)
#define VDPA_OPT_VDEV_HANDLE BIT(3)
+#define VDPA_OPT_VDEV_MAC BIT(4)
struct vdpa_opts {
uint64_t present; /* flags of present items */
@@ -27,6 +29,7 @@ struct vdpa_opts {
char *mdev_name;
const char *vdev_name;
unsigned int device_id;
+ char mac[ETH_ALEN];
};
struct vdpa {
@@ -136,6 +139,21 @@ static int vdpa_argv_str(struct vdpa *vdpa, int argc, char **argv,
return 0;
}
+static int vdpa_argv_mac(struct vdpa *vdpa, int argc, char **argv, char *mac)
+{
+ int alen;
+
+ if (argc <= 0 || *argv == NULL) {
+ fprintf(stderr, "String parameter expected\n");
+ return -EINVAL;
+ }
+
+ alen = ll_addr_a2n(mac, ETH_ALEN, *argv);
+ if (alen < 0)
+ return -EINVAL;
+ return 0;
+}
+
struct vdpa_args_metadata {
uint64_t o_flag;
const char *err_msg;
@@ -183,13 +201,16 @@ static void vdpa_opts_put(struct nlmsghdr *nlh, struct vdpa *vdpa)
if ((opts->present & VDPA_OPT_VDEV_NAME) ||
(opts->present & VDPA_OPT_VDEV_HANDLE))
mnl_attr_put_strz(nlh, VDPA_ATTR_DEV_NAME, opts->vdev_name);
+ if (opts->present & VDPA_OPT_VDEV_MAC)
+ mnl_attr_put(nlh, VDPA_ATTR_DEV_NET_CFG_MACADDR,
+ sizeof(opts->mac), opts->mac);
}
static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
- uint64_t o_required)
+ uint64_t o_required, uint64_t o_optional)
{
+ uint64_t o_all = o_required | o_optional;
struct vdpa_opts *opts = &vdpa->opts;
- uint64_t o_all = o_required;
uint64_t o_found = 0;
int err;
@@ -233,6 +254,15 @@ static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
NEXT_ARG_FWD();
o_found |= VDPA_OPT_VDEV_MGMTDEV_HANDLE;
+ } else if ((strcmp(*argv, "mac") == 0) &&
+ (o_all & VDPA_OPT_VDEV_MAC)) {
+ NEXT_ARG_FWD();
+ err = vdpa_argv_mac(vdpa, argc, argv, opts->mac);
+ if (err)
+ return err;
+
+ NEXT_ARG_FWD();
+ o_found |= VDPA_OPT_VDEV_MAC;
} else {
fprintf(stderr, "Unknown option \"%s\"\n", *argv);
return -EINVAL;
@@ -246,11 +276,11 @@ static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
static int vdpa_argv_parse_put(struct nlmsghdr *nlh, struct vdpa *vdpa,
int argc, char **argv,
- uint64_t o_required)
+ uint64_t o_required, uint64_t o_optional)
{
int err;
- err = vdpa_argv_parse(vdpa, argc, argv, o_required);
+ err = vdpa_argv_parse(vdpa, argc, argv, o_required, o_optional);
if (err)
return err;
vdpa_opts_put(nlh, vdpa);
@@ -386,7 +416,7 @@ static int cmd_mgmtdev_show(struct vdpa *vdpa, int argc, char **argv)
flags);
if (argc > 0) {
err = vdpa_argv_parse_put(nlh, vdpa, argc, argv,
- VDPA_OPT_MGMTDEV_HANDLE);
+ VDPA_OPT_MGMTDEV_HANDLE, 0);
if (err)
return err;
}
@@ -413,7 +443,7 @@ static int cmd_mgmtdev(struct vdpa *vdpa, int argc, char **argv)
static void cmd_dev_help(void)
{
fprintf(stderr, "Usage: vdpa dev show [ DEV ]\n");
- fprintf(stderr, " vdpa dev add name NAME mgmtdev MANAGEMENTDEV\n");
+ fprintf(stderr, " vdpa dev add name NAME mgmtdev MANAGEMENTDEV [ mac MACADDR ]\n");
fprintf(stderr, " vdpa dev del DEV\n");
fprintf(stderr, "Usage: vdpa dev config COMMAND [ OPTIONS ]\n");
}
@@ -483,7 +513,7 @@ static int cmd_dev_show(struct vdpa *vdpa, int argc, char **argv)
nlh = mnlu_gen_socket_cmd_prepare(&vdpa->nlg, VDPA_CMD_DEV_GET, flags);
if (argc > 0) {
err = vdpa_argv_parse_put(nlh, vdpa, argc, argv,
- VDPA_OPT_VDEV_HANDLE);
+ VDPA_OPT_VDEV_HANDLE, 0);
if (err)
return err;
}
@@ -502,7 +532,8 @@ static int cmd_dev_add(struct vdpa *vdpa, int argc, char **argv)
nlh = mnlu_gen_socket_cmd_prepare(&vdpa->nlg, VDPA_CMD_DEV_NEW,
NLM_F_REQUEST | NLM_F_ACK);
err = vdpa_argv_parse_put(nlh, vdpa, argc, argv,
- VDPA_OPT_VDEV_MGMTDEV_HANDLE | VDPA_OPT_VDEV_NAME);
+ VDPA_OPT_VDEV_MGMTDEV_HANDLE | VDPA_OPT_VDEV_NAME,
+ VDPA_OPT_VDEV_MAC);
if (err)
return err;
@@ -516,7 +547,8 @@ static int cmd_dev_del(struct vdpa *vdpa, int argc, char **argv)
nlh = mnlu_gen_socket_cmd_prepare(&vdpa->nlg, VDPA_CMD_DEV_DEL,
NLM_F_REQUEST | NLM_F_ACK);
- err = vdpa_argv_parse_put(nlh, vdpa, argc, argv, VDPA_OPT_VDEV_HANDLE);
+ err = vdpa_argv_parse_put(nlh, vdpa, argc, argv, VDPA_OPT_VDEV_HANDLE,
+ 0);
if (err)
return err;
@@ -597,7 +629,7 @@ static int cmd_dev_config_show(struct vdpa *vdpa, int argc, char **argv)
flags);
if (argc > 0) {
err = vdpa_argv_parse_put(nlh, vdpa, argc, argv,
- VDPA_OPT_VDEV_HANDLE);
+ VDPA_OPT_VDEV_HANDLE, 0);
if (err)
return err;
}
--
2.26.2
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