Implement mtu setting for vdpa device. $ vdpa mgmtdev show vdpasim_net: supported_classes net
Add the device with mac address and mtu: $ vdpa dev add name bar mgmtdev vdpasim_net mac 00:11:22:33:44:55 mtu 9000 In above command only mac address or only mtu can also be set. View the config after setting: $ vdpa dev config show bar: mac 00:11:22:33:44:55 link up link_announce false mtu 9000 Signed-off-by: Parav Pandit <[email protected]> --- vdpa/vdpa.c | 42 ++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-) diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c index 9d20bdb4..7da2ea7a 100644 --- a/vdpa/vdpa.c +++ b/vdpa/vdpa.c @@ -22,6 +22,7 @@ #define VDPA_OPT_VDEV_NAME BIT(2) #define VDPA_OPT_VDEV_HANDLE BIT(3) #define VDPA_OPT_VDEV_MAC BIT(4) +#define VDPA_OPT_VDEV_MTU BIT(5) struct vdpa_opts { uint64_t present; /* flags of present items */ @@ -30,6 +31,7 @@ struct vdpa_opts { const char *vdev_name; unsigned int device_id; char mac[ETH_ALEN]; + uint16_t mtu; }; struct vdpa { @@ -154,6 +156,31 @@ static int vdpa_argv_mac(struct vdpa *vdpa, int argc, char **argv, char *mac) return 0; } +static int strtouint16_t(const char *str, uint16_t *p_val) +{ + char *endptr; + unsigned long int val; + + val = strtoul(str, &endptr, 10); + if (endptr == str || *endptr != '\0') + return -EINVAL; + if (val > USHRT_MAX) + return -ERANGE; + *p_val = val; + return 0; +} + +static int vdpa_argv_u16(struct vdpa *vdpa, int argc, char **argv, + uint16_t *result) +{ + if (argc <= 0 || *argv == NULL) { + fprintf(stderr, "number expected\n"); + return -EINVAL; + } + + return strtouint16_t(*argv, result); +} + struct vdpa_args_metadata { uint64_t o_flag; const char *err_msg; @@ -204,6 +231,8 @@ static void vdpa_opts_put(struct nlmsghdr *nlh, struct vdpa *vdpa) if (opts->present & VDPA_OPT_VDEV_MAC) mnl_attr_put(nlh, VDPA_ATTR_DEV_NET_CFG_MACADDR, sizeof(opts->mac), opts->mac); + if (opts->present & VDPA_OPT_VDEV_MTU) + mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MTU, opts->mtu); } static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv, @@ -263,6 +292,15 @@ static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv, NEXT_ARG_FWD(); o_found |= VDPA_OPT_VDEV_MAC; + } else if ((matches(*argv, "mtu") == 0) && + (o_all & VDPA_OPT_VDEV_MTU)) { + NEXT_ARG_FWD(); + err = vdpa_argv_u16(vdpa, argc, argv, &opts->mtu); + if (err) + return err; + + NEXT_ARG_FWD(); + o_found |= VDPA_OPT_VDEV_MTU; } else { fprintf(stderr, "Unknown option \"%s\"\n", *argv); return -EINVAL; @@ -443,7 +481,7 @@ 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 [ mac MACADDR ]\n"); + fprintf(stderr, " vdpa dev add name NAME mgmtdev MANAGEMENTDEV [ mac MACADDR ] [ mtu MTU ]\n"); fprintf(stderr, " vdpa dev del DEV\n"); fprintf(stderr, "Usage: vdpa dev config COMMAND [ OPTIONS ]\n"); } @@ -533,7 +571,7 @@ static int cmd_dev_add(struct vdpa *vdpa, int argc, char **argv) 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_MAC); + VDPA_OPT_VDEV_MAC | VDPA_OPT_VDEV_MTU); if (err) return err; -- 2.26.2 _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
