io/vnic/vnic_ctl.c

	vnic_ctl.c revision 193974072f41a843678abf5f61979c748687e66b
/*
 * 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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Virtual Network Interface Card (VNIC)
 */

#include <sys/conf.h>
#include <sys/modctl.h>
#include <sys/vnic.h>
#include <sys/vnic_impl.h>
#include <inet/common.h>

/* module description */
#define VNIC_LINKINFO       "VNIC MAC"

/* device info ptr, only one for instance 0 */
static dev_info_t *vnic_dip = NULL;
static int vnic_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **);
static int vnic_attach(dev_info_t *, ddi_attach_cmd_t);
static int vnic_detach(dev_info_t *, ddi_detach_cmd_t);
static dld_ioc_func_t vnic_ioc_create, vnic_ioc_modify, vnic_ioc_delete,
    vnic_ioc_info;

static dld_ioc_info_t vnic_ioc_list[] = {
    {VNIC_IOC_CREATE, DLDCOPYIN | DLDDLCONFIG, sizeof (vnic_ioc_create_t),
        vnic_ioc_create},
    {VNIC_IOC_DELETE, DLDCOPYIN | DLDDLCONFIG, sizeof (vnic_ioc_delete_t),
        vnic_ioc_delete},
    {VNIC_IOC_INFO, DLDCOPYINOUT, sizeof (vnic_ioc_info_t),
        vnic_ioc_info},
    {VNIC_IOC_MODIFY, DLDCOPYIN | DLDDLCONFIG, sizeof (vnic_ioc_modify_t),
        vnic_ioc_modify}
};

static struct cb_ops vnic_cb_ops = {
    nulldev,        /* open */
    nulldev,        /* close */
    nulldev,        /* strategy */
    nulldev,        /* print */
    nodev,          /* dump */
    nodev,          /* read */
    nodev,          /* write */
    nodev,          /* ioctl */
    nodev,          /* devmap */
    nodev,          /* mmap */
    nodev,          /* segmap */
    nochpoll,       /* poll */
    ddi_prop_op,        /* cb_prop_op */
    0,          /* streamtab  */
    D_MP            /* Driver compatibility flag */
};

static struct dev_ops vnic_dev_ops = {
    DEVO_REV,       /* devo_rev */
    0,          /* refcnt */
    vnic_getinfo,       /* get_dev_info */
    nulldev,        /* identify */
    nulldev,        /* probe */
    vnic_attach,        /* attach */
    vnic_detach,        /* detach */
    nodev,          /* reset */
    &vnic_cb_ops,       /* driver operations */
    NULL,           /* bus operations */
    nodev,          /* dev power */
    ddi_quiesce_not_supported,  /* dev quiesce */
};

static struct modldrv vnic_modldrv = {
    &mod_driverops,     /* Type of module.  This one is a driver */
    VNIC_LINKINFO,      /* short description */
    &vnic_dev_ops       /* driver specific ops */
};

static struct modlinkage modlinkage = {
    MODREV_1,
    &vnic_modldrv,
    NULL
};

int
_init(void)
{
    int err;

    mac_init_ops(&vnic_dev_ops, "vnic");
    if ((err = mod_install(&modlinkage)) != 0)
        mac_fini_ops(&vnic_dev_ops);
    return (err);
}

int
_fini(void)
{
    int err;

    if ((err = mod_remove(&modlinkage)) == 0)
        mac_fini_ops(&vnic_dev_ops);
    return (err);
}

int
_info(struct modinfo *modinfop)
{
    return (mod_info(&modlinkage, modinfop));
}

static void
vnic_init(void)
{
    vnic_dev_init();
    vnic_bcast_init();
    vnic_classifier_init();
}

static void
vnic_fini(void)
{
    vnic_dev_fini();
    vnic_bcast_fini();
    vnic_classifier_fini();
}

dev_info_t *
vnic_get_dip(void)
{
    return (vnic_dip);
}

/*ARGSUSED*/
static int
vnic_getinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg,
    void **result)
{
    switch (infocmd) {
    case DDI_INFO_DEVT2DEVINFO:
        *result = vnic_dip;
        return (DDI_SUCCESS);
    case DDI_INFO_DEVT2INSTANCE:
        *result = 0;
        return (DDI_SUCCESS);
    }
    return (DDI_FAILURE);
}

static int
vnic_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
    switch (cmd) {
    case DDI_ATTACH:
        if (ddi_get_instance(dip) != 0) {
            /* we only allow instance 0 to attach */
            return (DDI_FAILURE);
        }

        if (dld_ioc_register(VNIC_IOC, vnic_ioc_list,
            DLDIOCCNT(vnic_ioc_list)) != 0)
            return (DDI_FAILURE);

        vnic_dip = dip;
        vnic_init();

        return (DDI_SUCCESS);

    case DDI_RESUME:
        return (DDI_SUCCESS);

    default:
        return (DDI_FAILURE);
    }
}

/*ARGSUSED*/
static int
vnic_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
    switch (cmd) {
    case DDI_DETACH:
        /*
         * Allow the VNIC instance to be detached only if there
         * are not VNICs configured.
         */
        if (vnic_dev_count() > 0)
            return (DDI_FAILURE);

        vnic_dip = NULL;
        vnic_fini();
        dld_ioc_unregister(VNIC_IOC);

        return (DDI_SUCCESS);

    case DDI_SUSPEND:
        return (DDI_SUCCESS);

    default:
        return (DDI_FAILURE);
    }
}

/*
 * Process a VNIC_IOC_CREATE request.
 */
/* ARGSUSED */
static int
vnic_ioc_create(void *karg, intptr_t arg, int mode, cred_t *cred)
{
    vnic_ioc_create_t *create_arg = karg;
    int mac_len;
    uchar_t mac_addr[MAXMACADDRLEN];
    datalink_id_t vnic_id, linkid;
    vnic_mac_addr_type_t mac_addr_type;

    /*
     * VNIC link id
     */
    vnic_id = create_arg->vc_vnic_id;

    /*
     * Linkid of the link the VNIC is defined on top of.
     */
    linkid = create_arg->vc_link_id;

    /* MAC address */
    mac_addr_type = create_arg->vc_mac_addr_type;
    mac_len = create_arg->vc_mac_len;

    switch (mac_addr_type) {
    case VNIC_MAC_ADDR_TYPE_FIXED:
        bcopy(create_arg->vc_mac_addr, mac_addr, MAXMACADDRLEN);
        break;
    default:
        return (ENOTSUP);
    }

    return (vnic_dev_create(vnic_id, linkid, mac_len, mac_addr));
}

/* ARGSUSED */
static int
vnic_ioc_modify(void *karg, intptr_t arg, int mode, cred_t *cred)
{
    vnic_ioc_modify_t *modify_arg = karg;
    datalink_id_t vnic_id;
    uint_t modify_mask;
    vnic_mac_addr_type_t mac_addr_type;
    uint_t mac_len;
    uchar_t mac_addr[MAXMACADDRLEN];

    vnic_id = modify_arg->vm_vnic_id;
    modify_mask = modify_arg->vm_modify_mask;

    if (modify_mask & VNIC_IOC_MODIFY_ADDR) {
        mac_addr_type = modify_arg->vm_mac_addr_type;
        mac_len = modify_arg->vm_mac_len;
        bcopy(modify_arg->vm_mac_addr, mac_addr, MAXMACADDRLEN);
    }

    return (vnic_dev_modify(vnic_id, modify_mask, mac_addr_type,
        mac_len, mac_addr));
}

/* ARGSUSED */
static int
vnic_ioc_delete(void *karg, intptr_t arg, int mode, cred_t *cred)
{
    vnic_ioc_delete_t *delete_arg = karg;

    return (vnic_dev_delete(delete_arg->vd_vnic_id));
}

typedef struct vnic_ioc_info_state {
    uint32_t    bytes_left;
    uchar_t     *where;
    int     mode;
} vnic_ioc_info_state_t;

static int
vnic_ioc_info_new_vnic(void *arg, datalink_id_t id,
    vnic_mac_addr_type_t addr_type, uint_t mac_len, uint8_t *mac_addr,
    datalink_id_t linkid)
{
    vnic_ioc_info_state_t *state = arg;
    /*LINTED*/
    vnic_ioc_info_vnic_t *vn = (vnic_ioc_info_vnic_t *)state->where;

    if (state->bytes_left < sizeof (*vn))
        return (ENOSPC);

    vn->vn_vnic_id = id;
    vn->vn_link_id = linkid;
    vn->vn_mac_addr_type = addr_type;
    vn->vn_mac_len = mac_len;
    if (ddi_copyout(mac_addr, &(vn->vn_mac_addr), mac_len,
        state->mode) != 0)
        return (EFAULT);

    state->where += sizeof (*vn);
    state->bytes_left -= sizeof (*vn);

    return (0);
}

/* ARGSUSED */
static int
vnic_ioc_info(void *karg, intptr_t arg, int mode, cred_t *cred)
{
    vnic_ioc_info_t *info_argp = karg;
    uint32_t nvnics;
    datalink_id_t vnic_id, linkid;
    vnic_ioc_info_state_t state;

    /*
     * ID of the vnic to return or vnic device.
     * If zero, the call returns information
     * regarding all vnics currently defined.
     */
    vnic_id = info_argp->vi_vnic_id;
    linkid = info_argp->vi_linkid;

    state.bytes_left = info_argp->vi_size;
    state.where = (uchar_t *)(arg + sizeof (vnic_ioc_info_t));
    state.mode = mode;

    return (vnic_info(&nvnics, vnic_id, linkid, &state,
        vnic_ioc_info_new_vnic));
}