libdladm/common/libdlvnic.c

	libdlvnic.c revision 2b24ab6b3865caeede9eeb9db6b83e1d89dcd1ea
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <stropts.h>
#include <stdlib.h>
#include <errno.h>
#include <strings.h>
#include <libintl.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <sys/dld.h>
#include <libdladm_impl.h>
#include <libdllink.h>
#include <libdlbridge.h>
#include <libdlvnic.h>

/*
 * VNIC administration library.
 */

/*
 * Default random MAC address prefix (locally administered).
 */
static char dladm_vnic_def_prefix[] = {0x02, 0x08, 0x20};

static dladm_status_t   dladm_vnic_persist_conf(dladm_handle_t,
                const char *name, dladm_vnic_attr_t *,
                datalink_class_t);
static const char   *dladm_vnic_macaddr2str(const uchar_t *, char *);
static dladm_status_t   dladm_vnic_str2macaddr(const char *, uchar_t *);

/*
 * Convert a diagnostic returned by the kernel into a dladm_status_t.
 */
static dladm_status_t
dladm_vnic_diag2status(vnic_ioc_diag_t ioc_diag)
{
    switch (ioc_diag) {
    case VNIC_IOC_DIAG_MACADDR_INVALID:
        return (DLADM_STATUS_INVALIDMACADDR);
    case VNIC_IOC_DIAG_MACADDRLEN_INVALID:
        return (DLADM_STATUS_INVALIDMACADDRLEN);
    case VNIC_IOC_DIAG_MACADDR_NIC:
        return (DLADM_STATUS_INVALIDMACADDRNIC);
    case VNIC_IOC_DIAG_MACADDR_INUSE:
        return (DLADM_STATUS_INVALIDMACADDRINUSE);
    case VNIC_IOC_DIAG_MACFACTORYSLOTINVALID:
        return (DLADM_STATUS_MACFACTORYSLOTINVALID);
    case VNIC_IOC_DIAG_MACFACTORYSLOTUSED:
        return (DLADM_STATUS_MACFACTORYSLOTUSED);
    case VNIC_IOC_DIAG_MACFACTORYSLOTALLUSED:
        return (DLADM_STATUS_MACFACTORYSLOTALLUSED);
    case VNIC_IOC_DIAG_MACFACTORYNOTSUP:
        return (DLADM_STATUS_MACFACTORYNOTSUP);
    case VNIC_IOC_DIAG_MACPREFIX_INVALID:
        return (DLADM_STATUS_INVALIDMACPREFIX);
    case VNIC_IOC_DIAG_MACPREFIXLEN_INVALID:
        return (DLADM_STATUS_INVALIDMACPREFIXLEN);
    case VNIC_IOC_DIAG_MACMARGIN_INVALID:
        return (DLADM_STATUS_INVALID_MACMARGIN);
    case VNIC_IOC_DIAG_NO_HWRINGS:
        return (DLADM_STATUS_NO_HWRINGS);
    }
    return (DLADM_STATUS_OK);
}

/*
 * Send a create command to the VNIC driver.
 */
dladm_status_t
i_dladm_vnic_create_sys(dladm_handle_t handle, dladm_vnic_attr_t *attr)
{
    int rc;
    vnic_ioc_create_t ioc;
    dladm_status_t status = DLADM_STATUS_OK;

    bzero(&ioc, sizeof (ioc));
    ioc.vc_vnic_id = attr->va_vnic_id;
    ioc.vc_link_id = attr->va_link_id;
    ioc.vc_mac_addr_type = attr->va_mac_addr_type;
    ioc.vc_mac_len = attr->va_mac_len;
    ioc.vc_mac_slot = attr->va_mac_slot;
    ioc.vc_mac_prefix_len = attr->va_mac_prefix_len;
    ioc.vc_vid = attr->va_vid;
    ioc.vc_flags = attr->va_force ? VNIC_IOC_CREATE_FORCE : 0;
    ioc.vc_flags |= attr->va_hwrings ? VNIC_IOC_CREATE_REQ_HWRINGS : 0;

    if (attr->va_mac_len > 0 || ioc.vc_mac_prefix_len > 0)
        bcopy(attr->va_mac_addr, ioc.vc_mac_addr, MAXMACADDRLEN);
    bcopy(&attr->va_resource_props, &ioc.vc_resource_props,
        sizeof (mac_resource_props_t));
    if (attr->va_link_id == DATALINK_INVALID_LINKID)
        ioc.vc_flags |= VNIC_IOC_CREATE_ANCHOR;

    rc = ioctl(dladm_dld_fd(handle), VNIC_IOC_CREATE, &ioc);
    if (rc < 0)
        status = dladm_errno2status(errno);

    if (status != DLADM_STATUS_OK) {
        if (ioc.vc_diag != VNIC_IOC_DIAG_NONE)
            status = dladm_vnic_diag2status(ioc.vc_diag);
    }
    if (status != DLADM_STATUS_OK)
        return (status);

    attr->va_mac_addr_type = ioc.vc_mac_addr_type;
    switch (ioc.vc_mac_addr_type) {
    case VNIC_MAC_ADDR_TYPE_FACTORY:
        attr->va_mac_slot = ioc.vc_mac_slot;
        break;
    case VNIC_MAC_ADDR_TYPE_RANDOM:
        bcopy(ioc.vc_mac_addr, attr->va_mac_addr, MAXMACADDRLEN);
        attr->va_mac_len = ioc.vc_mac_len;
        break;
    }
    return (status);
}

/*
 * Get the configuration information of the given VNIC.
 */
static dladm_status_t
i_dladm_vnic_info_active(dladm_handle_t handle, datalink_id_t linkid,
    dladm_vnic_attr_t *attrp)
{
    vnic_ioc_info_t ioc;
    vnic_info_t *vnic;
    int rc;
    dladm_status_t status = DLADM_STATUS_OK;

    bzero(&ioc, sizeof (ioc));
    vnic = &ioc.vi_info;
    vnic->vn_vnic_id = linkid;

    rc = ioctl(dladm_dld_fd(handle), VNIC_IOC_INFO, &ioc);
    if (rc != 0) {
        status = dladm_errno2status(errno);
        goto bail;
    }

    attrp->va_vnic_id = vnic->vn_vnic_id;
    attrp->va_link_id = vnic->vn_link_id;
    attrp->va_mac_addr_type = vnic->vn_mac_addr_type;
    bcopy(vnic->vn_mac_addr, attrp->va_mac_addr, MAXMACADDRLEN);
    attrp->va_mac_len = vnic->vn_mac_len;
    attrp->va_mac_slot = vnic->vn_mac_slot;
    attrp->va_mac_prefix_len = vnic->vn_mac_prefix_len;
    attrp->va_vid = vnic->vn_vid;
    attrp->va_force = vnic->vn_force;

bail:
    return (status);
}

static dladm_status_t
i_dladm_vnic_info_persist(dladm_handle_t handle, datalink_id_t linkid,
    dladm_vnic_attr_t *attrp)
{
    dladm_conf_t conf;
    dladm_status_t status;
    char macstr[ETHERADDRL * 3];
    char linkover[MAXLINKNAMELEN];
    uint64_t u64;
    datalink_class_t class;

    attrp->va_vnic_id = linkid;
    if ((status = dladm_read_conf(handle, linkid, &conf)) !=
        DLADM_STATUS_OK)
        return (status);

    status = dladm_get_conf_field(handle, conf, FLINKOVER, linkover,
        sizeof (linkover));
    if (status != DLADM_STATUS_OK) {
        /*
         * This isn't an error, etherstubs don't have a FLINKOVER
         * property.
         */
        attrp->va_link_id = DATALINK_INVALID_LINKID;
    } else {
        if ((status = dladm_name2info(handle, linkover,
            &attrp->va_link_id, NULL, NULL, NULL)) != DLADM_STATUS_OK)
            goto done;
    }

    status = dladm_get_conf_field(handle, conf, FHWRINGS,
        &attrp->va_hwrings, sizeof (boolean_t));

    if (status != DLADM_STATUS_OK && status != DLADM_STATUS_NOTFOUND)
        goto done;
    if (status == DLADM_STATUS_NOTFOUND)
        attrp->va_hwrings = B_FALSE;

    if ((status = dladm_datalink_id2info(handle, linkid, NULL, &class,
        NULL, NULL, 0)) != DLADM_STATUS_OK)
        goto done;

    if (class == DATALINK_CLASS_VLAN) {
        if (attrp->va_link_id == DATALINK_INVALID_LINKID) {
            status = DLADM_STATUS_BADARG;
            goto done;
        }
        attrp->va_mac_addr_type = VNIC_MAC_ADDR_TYPE_PRIMARY;
        attrp->va_mac_len = 0;
    } else {
        status = dladm_get_conf_field(handle, conf, FMADDRTYPE, &u64,
            sizeof (u64));
        if (status != DLADM_STATUS_OK)
            goto done;

        attrp->va_mac_addr_type = (vnic_mac_addr_type_t)u64;

        status = dladm_get_conf_field(handle, conf, FMADDRLEN, &u64,
            sizeof (u64));
        attrp->va_mac_len = ((status == DLADM_STATUS_OK) ?
            (uint_t)u64 : ETHERADDRL);

        status = dladm_get_conf_field(handle, conf, FMADDRSLOT, &u64,
            sizeof (u64));
        attrp->va_mac_slot = ((status == DLADM_STATUS_OK) ?
            (int)u64 : -1);

        status = dladm_get_conf_field(handle, conf, FMADDRPREFIXLEN,
            &u64, sizeof (u64));
        attrp->va_mac_prefix_len = ((status == DLADM_STATUS_OK) ?
            (uint_t)u64 : sizeof (dladm_vnic_def_prefix));

        status = dladm_get_conf_field(handle, conf, FMACADDR, macstr,
            sizeof (macstr));
        if (status != DLADM_STATUS_OK)
            goto done;

        status = dladm_vnic_str2macaddr(macstr, attrp->va_mac_addr);
        if (status != DLADM_STATUS_OK)
            goto done;
    }

    status = dladm_get_conf_field(handle, conf, FVLANID, &u64,
        sizeof (u64));
    attrp->va_vid = ((status == DLADM_STATUS_OK) ?  (uint16_t)u64 : 0);


    status = DLADM_STATUS_OK;
done:
    dladm_destroy_conf(handle, conf);
    return (status);
}

dladm_status_t
dladm_vnic_info(dladm_handle_t handle, datalink_id_t linkid,
    dladm_vnic_attr_t *attrp, uint32_t flags)
{
    if (flags == DLADM_OPT_ACTIVE)
        return (i_dladm_vnic_info_active(handle, linkid, attrp));
    else if (flags == DLADM_OPT_PERSIST)
        return (i_dladm_vnic_info_persist(handle, linkid, attrp));
    else
        return (DLADM_STATUS_BADARG);
}

/*
 * Remove a VNIC from the kernel.
 */
dladm_status_t
i_dladm_vnic_delete_sys(dladm_handle_t handle, datalink_id_t linkid)
{
    vnic_ioc_delete_t ioc;
    dladm_status_t status = DLADM_STATUS_OK;
    int rc;

    ioc.vd_vnic_id = linkid;

    rc = ioctl(dladm_dld_fd(handle), VNIC_IOC_DELETE, &ioc);
    if (rc < 0)
        status = dladm_errno2status(errno);

    return (status);
}

/*
 * Convert between MAC address types and their string representations.
 */

typedef struct dladm_vnic_addr_type_s {
    const char      *va_str;
    vnic_mac_addr_type_t    va_type;
} dladm_vnic_addr_type_t;

static dladm_vnic_addr_type_t addr_types[] = {
    {"fixed", VNIC_MAC_ADDR_TYPE_FIXED},
    {"random", VNIC_MAC_ADDR_TYPE_RANDOM},
    {"factory", VNIC_MAC_ADDR_TYPE_FACTORY},
    {"auto", VNIC_MAC_ADDR_TYPE_AUTO},
    {"fixed", VNIC_MAC_ADDR_TYPE_PRIMARY}
};

#define NADDR_TYPES (sizeof (addr_types) / sizeof (dladm_vnic_addr_type_t))

static const char *
dladm_vnic_macaddrtype2str(vnic_mac_addr_type_t type)
{
    int i;

    for (i = 0; i < NADDR_TYPES; i++) {
        if (type == addr_types[i].va_type)
            return (addr_types[i].va_str);
    }
    return (NULL);
}

dladm_status_t
dladm_vnic_str2macaddrtype(const char *str, vnic_mac_addr_type_t *val)
{
    int i;
    dladm_vnic_addr_type_t *type;

    for (i = 0; i < NADDR_TYPES; i++) {
        type = &addr_types[i];
        if (strncmp(str, type->va_str, strlen(type->va_str)) == 0) {
            *val = type->va_type;
            return (DLADM_STATUS_OK);
        }
    }
    return (DLADM_STATUS_BADARG);
}

/*
 * Create a new VNIC / VLAN. Update the configuration file and bring it up.
 */
dladm_status_t
dladm_vnic_create(dladm_handle_t handle, const char *vnic, datalink_id_t linkid,
    vnic_mac_addr_type_t mac_addr_type, uchar_t *mac_addr, int mac_len,
    int *mac_slot, uint_t mac_prefix_len, uint16_t vid,
    datalink_id_t *vnic_id_out, dladm_arg_list_t *proplist, uint32_t flags)
{
    dladm_vnic_attr_t attr;
    datalink_id_t vnic_id;
    datalink_class_t class;
    uint32_t media = DL_ETHER;
    char name[MAXLINKNAMELEN];
    uchar_t tmp_addr[MAXMACADDRLEN];
    dladm_status_t status;
    boolean_t is_vlan;
    boolean_t is_etherstub;
    int i;
    boolean_t vnic_created = B_FALSE;
    boolean_t conf_set = B_FALSE;

    /*
     * Sanity test arguments.
     */
    if ((flags & DLADM_OPT_ACTIVE) == 0)
        return (DLADM_STATUS_NOTSUP);

    is_vlan = ((flags & DLADM_OPT_VLAN) != 0);
    if (is_vlan && ((vid < 1 || vid > 4094)))
        return (DLADM_STATUS_VIDINVAL);

    is_etherstub = (linkid == DATALINK_INVALID_LINKID);

    if (mac_len > MAXMACADDRLEN)
        return (DLADM_STATUS_INVALIDMACADDRLEN);

    if (!dladm_vnic_macaddrtype2str(mac_addr_type))
        return (DLADM_STATUS_INVALIDMACADDRTYPE);

    /*
     * If a random address might be generated, but no prefix
     * was specified by the caller, use the default MAC address
     * prefix.
     */
    if ((mac_addr_type == VNIC_MAC_ADDR_TYPE_RANDOM ||
        mac_addr_type == VNIC_MAC_ADDR_TYPE_AUTO) &&
        mac_prefix_len == 0) {
        mac_prefix_len = sizeof (dladm_vnic_def_prefix);
        mac_addr = tmp_addr;
        bcopy(dladm_vnic_def_prefix, mac_addr, mac_prefix_len);
    }

    if ((flags & DLADM_OPT_ANCHOR) == 0) {
        if ((status = dladm_datalink_id2info(handle, linkid, NULL,
            &class, &media, NULL, 0)) != DLADM_STATUS_OK)
            return (status);

        if (class == DATALINK_CLASS_VNIC ||
            class == DATALINK_CLASS_VLAN)
            return (DLADM_STATUS_BADARG);
    } else {
        /* it's an anchor VNIC */
        if (linkid != DATALINK_INVALID_LINKID || vid != 0)
            return (DLADM_STATUS_BADARG);
    }

    if (vnic == NULL) {
        flags |= DLADM_OPT_PREFIX;
        (void) strlcpy(name, "vnic", sizeof (name));
    } else {
        (void) strlcpy(name, vnic, sizeof (name));
    }

    class = is_vlan ? DATALINK_CLASS_VLAN :
        (is_etherstub ? DATALINK_CLASS_ETHERSTUB : DATALINK_CLASS_VNIC);
    if ((status = dladm_create_datalink_id(handle, name, class,
        media, flags, &vnic_id)) != DLADM_STATUS_OK)
        return (status);

    if ((flags & DLADM_OPT_PREFIX) != 0) {
        (void) snprintf(name + 4, sizeof (name), "%llu", vnic_id);
        flags &= ~DLADM_OPT_PREFIX;
    }

    bzero(&attr, sizeof (attr));

    /* Extract resource_ctl and cpu_list from proplist */
    if (proplist != NULL) {
        status = dladm_link_proplist_extract(handle, proplist,
            &attr.va_resource_props);
        if (status != DLADM_STATUS_OK)
            goto done;
    }

    attr.va_vnic_id = vnic_id;
    attr.va_link_id = linkid;
    attr.va_mac_addr_type = mac_addr_type;
    attr.va_mac_len = mac_len;
    if (mac_slot != NULL)
        attr.va_mac_slot = *mac_slot;
    if (mac_len > 0)
        bcopy(mac_addr, attr.va_mac_addr, mac_len);
    else if (mac_prefix_len > 0)
        bcopy(mac_addr, attr.va_mac_addr, mac_prefix_len);
    attr.va_mac_prefix_len = mac_prefix_len;
    attr.va_vid = vid;
    attr.va_force = (flags & DLADM_OPT_FORCE) != 0;
    attr.va_hwrings = (flags & DLADM_OPT_HWRINGS) != 0;

    status = i_dladm_vnic_create_sys(handle, &attr);
    if (status != DLADM_STATUS_OK)
        goto done;
    vnic_created = B_TRUE;

    /* Save vnic configuration and its properties */
    if (!(flags & DLADM_OPT_PERSIST))
        goto done;

    status = dladm_vnic_persist_conf(handle, name, &attr, class);
    if (status != DLADM_STATUS_OK)
        goto done;
    conf_set = B_TRUE;

    if (proplist != NULL) {
        for (i = 0; i < proplist->al_count; i++) {
            dladm_arg_info_t    *aip = &proplist->al_info[i];

            status = dladm_set_linkprop(handle, vnic_id,
                aip->ai_name, aip->ai_val, aip->ai_count,
                DLADM_OPT_PERSIST);
            if (status != DLADM_STATUS_OK)
                break;
        }
    }

done:
    if (status != DLADM_STATUS_OK) {
        if (conf_set)
            (void) dladm_remove_conf(handle, vnic_id);
        if (vnic_created)
            (void) i_dladm_vnic_delete_sys(handle, vnic_id);
        (void) dladm_destroy_datalink_id(handle, vnic_id, flags);
    } else {
        if (vnic_id_out != NULL)
            *vnic_id_out = vnic_id;
        if (mac_slot != NULL)
            *mac_slot = attr.va_mac_slot;
    }

    if (is_vlan) {
        dladm_status_t stat2;

        stat2 = dladm_bridge_refresh(handle, linkid);
        if (status == DLADM_STATUS_OK && stat2 != DLADM_STATUS_OK)
            status = stat2;
    }
    return (status);
}

/*
 * Delete a VNIC / VLAN.
 */
dladm_status_t
dladm_vnic_delete(dladm_handle_t handle, datalink_id_t linkid, uint32_t flags)
{
    dladm_status_t status;
    datalink_class_t class;

    if (flags == 0)
        return (DLADM_STATUS_BADARG);

    if ((dladm_datalink_id2info(handle, linkid, NULL, &class, NULL, NULL, 0)
        != DLADM_STATUS_OK))
        return (DLADM_STATUS_BADARG);

    if ((flags & DLADM_OPT_VLAN) != 0) {
        if (class != DATALINK_CLASS_VLAN)
            return (DLADM_STATUS_BADARG);
    } else {
        if (class != DATALINK_CLASS_VNIC &&
            class != DATALINK_CLASS_ETHERSTUB)
            return (DLADM_STATUS_BADARG);
    }

    if ((flags & DLADM_OPT_ACTIVE) != 0) {
        status = i_dladm_vnic_delete_sys(handle, linkid);
        if (status == DLADM_STATUS_OK) {
            (void) dladm_set_linkprop(handle, linkid, NULL, NULL, 0,
                DLADM_OPT_ACTIVE);
            (void) dladm_destroy_datalink_id(handle, linkid,
                DLADM_OPT_ACTIVE);
        } else if (status != DLADM_STATUS_NOTFOUND ||
            !(flags & DLADM_OPT_PERSIST)) {
            return (status);
        }
    }
    if ((flags & DLADM_OPT_PERSIST) != 0) {
        (void) dladm_remove_conf(handle, linkid);
        (void) dladm_destroy_datalink_id(handle, linkid,
            DLADM_OPT_PERSIST);
    }
    return (dladm_bridge_refresh(handle, linkid));
}

static const char *
dladm_vnic_macaddr2str(const uchar_t *mac, char *buf)
{
    static char unknown_mac[] = {0, 0, 0, 0, 0, 0};

    if (buf == NULL)
        return (NULL);

    if (bcmp(unknown_mac, mac, ETHERADDRL) == 0)
        (void) strlcpy(buf, "unknown", DLADM_STRSIZE);
    else
        return (_link_ntoa(mac, buf, ETHERADDRL, IFT_OTHER));

    return (buf);
}

static dladm_status_t
dladm_vnic_str2macaddr(const char *str, uchar_t *buf)
{
    int len = 0;
    uchar_t *b = _link_aton(str, &len);

    if (b == NULL || len >= MAXMACADDRLEN)
        return (DLADM_STATUS_BADARG);

    bcopy(b, buf, len);
    free(b);
    return (DLADM_STATUS_OK);
}


static dladm_status_t
dladm_vnic_persist_conf(dladm_handle_t handle, const char *name,
    dladm_vnic_attr_t *attrp, datalink_class_t class)
{
    dladm_conf_t conf = DLADM_INVALID_CONF;
    dladm_status_t status;
    char macstr[ETHERADDRL * 3];
    char linkover[MAXLINKNAMELEN];
    uint64_t u64;

    if ((status = dladm_create_conf(handle, name, attrp->va_vnic_id,
        class, DL_ETHER, &conf)) != DLADM_STATUS_OK)
        return (status);

    if (attrp->va_link_id != DATALINK_INVALID_LINKID) {
        status = dladm_datalink_id2info(handle, attrp->va_link_id, NULL,
            NULL, NULL, linkover, sizeof (linkover));
        if (status != DLADM_STATUS_OK)
            goto done;
        status = dladm_set_conf_field(handle, conf, FLINKOVER,
            DLADM_TYPE_STR, linkover);
        if (status != DLADM_STATUS_OK)
            goto done;
    }

    if (class != DATALINK_CLASS_VLAN) {
        u64 = attrp->va_mac_addr_type;
        status = dladm_set_conf_field(handle, conf, FMADDRTYPE,
            DLADM_TYPE_UINT64, &u64);
        if (status != DLADM_STATUS_OK)
            goto done;

        if (attrp->va_mac_len != ETHERADDRL) {
            u64 = attrp->va_mac_len;
            status = dladm_set_conf_field(handle, conf, FMADDRLEN,
                DLADM_TYPE_UINT64, &u64);
            if (status != DLADM_STATUS_OK)
                goto done;
        }
    }

    if (attrp->va_hwrings) {
        boolean_t hwrings = attrp->va_hwrings;
        status = dladm_set_conf_field(handle, conf, FHWRINGS,
            DLADM_TYPE_BOOLEAN, &hwrings);
        if (status != DLADM_STATUS_OK)
            goto done;
    }

    if (class != DATALINK_CLASS_VLAN) {
        if (attrp->va_mac_slot != -1) {
            u64 = attrp->va_mac_slot;
            status = dladm_set_conf_field(handle, conf, FMADDRSLOT,
                DLADM_TYPE_UINT64, &u64);
            if (status != DLADM_STATUS_OK)
            goto done;
        }

        if (attrp->va_mac_prefix_len !=
            sizeof (dladm_vnic_def_prefix)) {
            u64 = attrp->va_mac_prefix_len;
            status = dladm_set_conf_field(handle, conf,
                FMADDRPREFIXLEN, DLADM_TYPE_UINT64, &u64);
            if (status != DLADM_STATUS_OK)
                goto done;
        }

        (void) dladm_vnic_macaddr2str(attrp->va_mac_addr, macstr);
        status = dladm_set_conf_field(handle, conf, FMACADDR,
            DLADM_TYPE_STR, macstr);
        if (status != DLADM_STATUS_OK)
            goto done;
    }

    if (attrp->va_vid != 0) {
        u64 = attrp->va_vid;
        status = dladm_set_conf_field(handle, conf, FVLANID,
            DLADM_TYPE_UINT64, &u64);
        if (status != DLADM_STATUS_OK)
            goto done;
    }

    /*
     * Commit the link configuration.
     */
    status = dladm_write_conf(handle, conf);

done:
    dladm_destroy_conf(handle, conf);
    return (status);
}

typedef struct dladm_vnic_up_arg_s {
    uint32_t    flags;
    dladm_status_t  status;
} dladm_vnic_up_arg_t;

#define DLADM_VNIC_UP_FIRST_WALK    0x1
#define DLADM_VNIC_UP_SECOND_WALK   0x2

static int
i_dladm_vnic_up(dladm_handle_t handle, datalink_id_t linkid, void *arg)
{
    dladm_status_t *statusp = &(((dladm_vnic_up_arg_t *)arg)->status);
    dladm_vnic_attr_t attr;
    dladm_status_t status;
    dladm_arg_list_t *proplist;
    uint32_t flags = ((dladm_vnic_up_arg_t *)arg)->flags;

    bzero(&attr, sizeof (attr));

    status = dladm_vnic_info(handle, linkid, &attr, DLADM_OPT_PERSIST);
    if (status != DLADM_STATUS_OK)
        goto done;

    /*
     * Create the vnics that request hardware group first
     * Create the vnics that don't request hardware group in the second walk
     */
    if ((flags == DLADM_VNIC_UP_FIRST_WALK && !attr.va_hwrings) ||
        (flags == DLADM_VNIC_UP_SECOND_WALK && attr.va_hwrings))
            goto done;

    /* Get all properties for this vnic */
    status = dladm_link_get_proplist(handle, linkid, &proplist);
    if (status != DLADM_STATUS_OK)
        goto done;

    if (proplist != NULL) {
        status = dladm_link_proplist_extract(handle, proplist,
            &attr.va_resource_props);
    }

    status = i_dladm_vnic_create_sys(handle, &attr);
    if (status == DLADM_STATUS_OK) {
        status = dladm_up_datalink_id(handle, linkid);
        if (status != DLADM_STATUS_OK)
            (void) i_dladm_vnic_delete_sys(handle, linkid);
    }

done:
    *statusp = status;
    return (DLADM_WALK_CONTINUE);
}

dladm_status_t
dladm_vnic_up(dladm_handle_t handle, datalink_id_t linkid, uint32_t flags)
{
    dladm_vnic_up_arg_t vnic_arg;
    datalink_class_t class;

    class = ((flags & DLADM_OPT_VLAN) != 0) ? DATALINK_CLASS_VLAN :
        (DATALINK_CLASS_VNIC | DATALINK_CLASS_ETHERSTUB);

    if (linkid == DATALINK_ALL_LINKID) {
        vnic_arg.flags = DLADM_VNIC_UP_FIRST_WALK;
        (void) dladm_walk_datalink_id(i_dladm_vnic_up, handle,
            &vnic_arg, class, DATALINK_ANY_MEDIATYPE,
            DLADM_OPT_PERSIST);
        vnic_arg.flags = DLADM_VNIC_UP_SECOND_WALK;
        (void) dladm_walk_datalink_id(i_dladm_vnic_up, handle,
            &vnic_arg, class, DATALINK_ANY_MEDIATYPE,
            DLADM_OPT_PERSIST);
        return (DLADM_STATUS_OK);
    } else {
        (void) i_dladm_vnic_up(handle, linkid, &vnic_arg);
        return (vnic_arg.status);
    }
}