libdladm/common/libdlsim.c

/*
 * 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 (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
 */

#include <sys/types.h>
#include <string.h>
#include <strings.h>
#include <sys/mac.h>
#include <sys/dls_mgmt.h>
#include <sys/dlpi.h>
#include <net/simnet.h>
#include <errno.h>
#include <unistd.h>

#include <libdladm_impl.h>
#include <libdllink.h>
#include <libdlaggr.h>
#include <libdlsim.h>

static dladm_status_t dladm_simnet_persist_conf(dladm_handle_t, const char *,
    dladm_simnet_attr_t *);

/* New simnet instance creation */
static dladm_status_t
i_dladm_create_simnet(dladm_handle_t handle, dladm_simnet_attr_t *attrp)
{
    int rc;
    dladm_status_t status = DLADM_STATUS_OK;
    simnet_ioc_create_t ioc;

    bzero(&ioc, sizeof (ioc));
    ioc.sic_link_id = attrp->sna_link_id;
    ioc.sic_type = attrp->sna_type;
    if (attrp->sna_mac_len > 0 && attrp->sna_mac_len <= MAXMACADDRLEN) {
        ioc.sic_mac_len = attrp->sna_mac_len;
        bcopy(attrp->sna_mac_addr, ioc.sic_mac_addr, ioc.sic_mac_len);
    }

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

    if (status != DLADM_STATUS_OK)
        return (status);

    bcopy(ioc.sic_mac_addr, attrp->sna_mac_addr, MAXMACADDRLEN);
    attrp->sna_mac_len = ioc.sic_mac_len;
    return (status);
}

/* Modify existing simnet instance */
static dladm_status_t
i_dladm_modify_simnet(dladm_handle_t handle, dladm_simnet_attr_t *attrp)
{
    int rc;
    dladm_status_t status = DLADM_STATUS_OK;
    simnet_ioc_modify_t ioc;

    bzero(&ioc, sizeof (ioc));
    ioc.sim_link_id = attrp->sna_link_id;
    ioc.sim_peer_link_id = attrp->sna_peer_link_id;

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

    return (status);
}

/* Delete simnet instance */
static dladm_status_t
i_dladm_delete_simnet(dladm_handle_t handle, dladm_simnet_attr_t *attrp)
{
    int rc;
    simnet_ioc_delete_t ioc;

    bzero(&ioc, sizeof (ioc));
    ioc.sid_link_id = attrp->sna_link_id;

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

    (void) dladm_destroy_datalink_id(handle, attrp->sna_link_id,
        DLADM_OPT_ACTIVE);
    return (DLADM_STATUS_OK);
}

/* Retrieve simnet instance information */
static dladm_status_t
i_dladm_get_simnet_info(dladm_handle_t handle, dladm_simnet_attr_t *attrp)
{
    int rc;
    dladm_status_t status = DLADM_STATUS_OK;
    simnet_ioc_info_t ioc;

    bzero(&ioc, sizeof (ioc));
    ioc.sii_link_id = attrp->sna_link_id;

    rc = ioctl(dladm_dld_fd(handle), SIMNET_IOC_INFO, &ioc);
    if (rc < 0) {
        status = dladm_errno2status(errno);
        return (status);
    }

    bcopy(ioc.sii_mac_addr, attrp->sna_mac_addr, MAXMACADDRLEN);
    attrp->sna_mac_len = ioc.sii_mac_len;
    attrp->sna_peer_link_id = ioc.sii_peer_link_id;
    attrp->sna_type = ioc.sii_type;
    return (status);
}

/* Retrieve simnet configuratin */
static dladm_status_t
i_dladm_get_simnet_info_persist(dladm_handle_t handle,
    dladm_simnet_attr_t *attrp)
{
    dladm_conf_t conf;
    dladm_status_t status;
    char macstr[ETHERADDRL * 3];
    char simnetpeer[MAXLINKNAMELEN];
    uint64_t u64;
    boolean_t mac_fixed;

    if ((status = dladm_getsnap_conf(handle, attrp->sna_link_id,
        &conf)) != DLADM_STATUS_OK)
        return (status);

    status = dladm_get_conf_field(handle, conf, FSIMNETTYPE, &u64,
        sizeof (u64));
    if (status != DLADM_STATUS_OK)
        goto done;
    attrp->sna_type = (uint_t)u64;

    status = dladm_get_conf_field(handle, conf, FMADDRLEN, &u64,
        sizeof (u64));
    if (status != DLADM_STATUS_OK)
        goto done;
    attrp->sna_mac_len = (uint_t)u64;

    status = dladm_get_conf_field(handle, conf, FMACADDR, macstr,
        sizeof (macstr));
    if (status != DLADM_STATUS_OK)
        goto done;
    (void) dladm_aggr_str2macaddr(macstr, &mac_fixed, attrp->sna_mac_addr);

    /* Peer field is optional and only set when peer is attached */
    if (dladm_get_conf_field(handle, conf, FSIMNETPEER, simnetpeer,
        sizeof (simnetpeer)) == DLADM_STATUS_OK) {
        status = dladm_name2info(handle, simnetpeer,
            &attrp->sna_peer_link_id, NULL, NULL, NULL);
    } else {
        attrp->sna_peer_link_id = DATALINK_INVALID_LINKID;
    }
done:
    dladm_destroy_conf(handle, conf);
    return (status);
}

dladm_status_t
dladm_simnet_create(dladm_handle_t handle, const char *simnetname,
    uint_t media, uint32_t flags)
{
    datalink_id_t simnet_id;
    dladm_status_t status;
    dladm_simnet_attr_t attr;

    if (!(flags & DLADM_OPT_ACTIVE))
        return (DLADM_STATUS_NOTSUP);

    flags &= (DLADM_OPT_ACTIVE | DLADM_OPT_PERSIST);
    if ((status = dladm_create_datalink_id(handle, simnetname,
        DATALINK_CLASS_SIMNET, media, flags,
        &simnet_id)) != DLADM_STATUS_OK)
        return (status);

    bzero(&attr, sizeof (attr));
    attr.sna_link_id = simnet_id;
    attr.sna_type = media;
    status = i_dladm_create_simnet(handle, &attr);
    if (status != DLADM_STATUS_OK)
        goto done;

    if (!(flags & DLADM_OPT_PERSIST))
        goto done;

    status = dladm_simnet_persist_conf(handle, simnetname, &attr);
    if (status != DLADM_STATUS_OK) {
        (void) i_dladm_delete_simnet(handle, &attr);
        goto done;
    }

    (void) dladm_set_linkprop(handle, simnet_id, NULL, NULL, 0, flags);

done:
    if (status != DLADM_STATUS_OK) {
        (void) dladm_destroy_datalink_id(handle, simnet_id, flags);
    }
    return (status);
}

/* Update existing simnet configuration */
static dladm_status_t
i_dladm_simnet_update_conf(dladm_handle_t handle, datalink_id_t simnet_id,
    datalink_id_t peer_simnet_id)
{
    dladm_status_t status;
    dladm_conf_t conf;
    char simnetpeer[MAXLINKNAMELEN];

    status = dladm_open_conf(handle, simnet_id, &conf);
    if (status != DLADM_STATUS_OK)
        return (status);

    /* First clear previous peer if any in configuration */
    (void) dladm_unset_conf_field(handle, conf, FSIMNETPEER);
    if (peer_simnet_id != DATALINK_INVALID_LINKID) {
        if ((status = dladm_datalink_id2info(handle,
            peer_simnet_id, NULL, NULL, NULL, simnetpeer,
            sizeof (simnetpeer))) == DLADM_STATUS_OK) {
            status = dladm_set_conf_field(handle, conf,
                FSIMNETPEER, DLADM_TYPE_STR, simnetpeer);
        }
        if (status != DLADM_STATUS_OK)
            goto fail;
    }

    status = dladm_write_conf(handle, conf, simnet_id);
fail:
    dladm_destroy_conf(handle, conf);
    return (status);
}

/* Modify attached simnet peer */
dladm_status_t
dladm_simnet_modify(dladm_handle_t handle, datalink_id_t simnet_id,
    datalink_id_t peer_simnet_id, uint32_t flags)
{
    dladm_simnet_attr_t attr;
    dladm_simnet_attr_t prevattr;
    dladm_status_t status;
    datalink_class_t class;
    uint32_t linkflags;
    uint32_t peerlinkflags;

    if (!(flags & DLADM_OPT_ACTIVE))
        return (DLADM_STATUS_NOTSUP);

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

    if (peer_simnet_id != DATALINK_INVALID_LINKID) {
        if (dladm_datalink_id2info(handle, peer_simnet_id,
            &peerlinkflags, &class, NULL, NULL, 0) != DLADM_STATUS_OK)
            return (DLADM_STATUS_BADARG);
        if (class != DATALINK_CLASS_SIMNET)
            return (DLADM_STATUS_BADARG);
        /* Check to ensure the peer link has identical flags */
        if (peerlinkflags != linkflags)
            return (DLADM_STATUS_BADARG);
    }

    /* Retrieve previous attrs before modification */
    bzero(&prevattr, sizeof (prevattr));
    if ((status = dladm_simnet_info(handle, simnet_id, &prevattr,
        flags)) != DLADM_STATUS_OK)
        return (status);

    bzero(&attr, sizeof (attr));
    attr.sna_link_id = simnet_id;
    attr.sna_peer_link_id = peer_simnet_id;
    status = i_dladm_modify_simnet(handle, &attr);
    if ((status != DLADM_STATUS_OK) || !(flags & DLADM_OPT_PERSIST))
        return (status);

    /* First we clear link's existing peer field in config */
    status = i_dladm_simnet_update_conf(handle, simnet_id,
        DATALINK_INVALID_LINKID);
    if (status != DLADM_STATUS_OK)
        return (status);

    /* Clear the previous peer link's existing peer field in config */
    if (prevattr.sna_peer_link_id != DATALINK_INVALID_LINKID) {
        status = i_dladm_simnet_update_conf(handle,
            prevattr.sna_peer_link_id, DATALINK_INVALID_LINKID);
        if (status != DLADM_STATUS_OK)
            return (status);
    }

    /* Update the configuration in both simnets with any new peer link */
    if (peer_simnet_id != DATALINK_INVALID_LINKID) {
        status = i_dladm_simnet_update_conf(handle, simnet_id,
            peer_simnet_id);
        if (status == DLADM_STATUS_OK)
            status = i_dladm_simnet_update_conf(handle,
                peer_simnet_id, simnet_id);
    }

    return (status);
}

dladm_status_t
dladm_simnet_delete(dladm_handle_t handle, datalink_id_t simnet_id,
    uint32_t flags)
{
    dladm_simnet_attr_t attr;
    dladm_simnet_attr_t prevattr;
    dladm_status_t status;
    datalink_class_t class;

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

    if (class != DATALINK_CLASS_SIMNET)
        return (DLADM_STATUS_BADARG);

    /* Check current simnet attributes before deletion */
    flags &= (DLADM_OPT_ACTIVE | DLADM_OPT_PERSIST);
    bzero(&prevattr, sizeof (prevattr));
    if ((status = dladm_simnet_info(handle, simnet_id, &prevattr,
        flags)) != DLADM_STATUS_OK)
        return (status);

    bzero(&attr, sizeof (attr));
    attr.sna_link_id = simnet_id;
    if (flags & DLADM_OPT_ACTIVE) {
        status = i_dladm_delete_simnet(handle, &attr);
        if (status == DLADM_STATUS_OK ||
            status == DLADM_STATUS_NOTFOUND) {
            (void) dladm_set_linkprop(handle, simnet_id, NULL,
                NULL, 0, DLADM_OPT_ACTIVE);
            (void) dladm_destroy_datalink_id(handle, simnet_id,
                DLADM_OPT_ACTIVE);
        } else {
            return (status);
        }
    }

    if (flags & DLADM_OPT_PERSIST) {
        (void) dladm_remove_conf(handle, simnet_id);
        (void) dladm_destroy_datalink_id(handle, simnet_id,
            DLADM_OPT_PERSIST);

        /* Update any attached peer configuration */
        if (prevattr.sna_peer_link_id != DATALINK_INVALID_LINKID)
            status = i_dladm_simnet_update_conf(handle,
                prevattr.sna_peer_link_id, DATALINK_INVALID_LINKID);
    }
    return (status);
}

/* Retrieve simnet information either active or from configuration */
dladm_status_t
dladm_simnet_info(dladm_handle_t handle, datalink_id_t simnet_id,
    dladm_simnet_attr_t *attrp, uint32_t flags)
{
    datalink_class_t class;
    dladm_status_t status;

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

    if (class != DATALINK_CLASS_SIMNET)
        return (DLADM_STATUS_BADARG);

    bzero(attrp, sizeof (attrp));
    attrp->sna_link_id = simnet_id;

    if (flags & DLADM_OPT_ACTIVE) {
        status = i_dladm_get_simnet_info(handle, attrp);
        /*
         * If no active simnet found then return any simnet
         * from stored config if requested.
         */
        if (status == DLADM_STATUS_NOTFOUND &&
            (flags & DLADM_OPT_PERSIST))
            return (i_dladm_get_simnet_info_persist(handle, attrp));
        return (status);
    } else if (flags & DLADM_OPT_PERSIST) {
        return (i_dladm_get_simnet_info_persist(handle, attrp));
    } else {
        return (DLADM_STATUS_BADARG);
    }
}

/* Bring up simnet from stored configuration */
static int
i_dladm_simnet_up(dladm_handle_t handle, datalink_id_t simnet_id, void *arg)
{
    dladm_status_t *statusp = arg;
    dladm_status_t status;
    dladm_simnet_attr_t attr;
    dladm_simnet_attr_t peer_attr;

    bzero(&attr, sizeof (attr));
    attr.sna_link_id = simnet_id;
    status = dladm_simnet_info(handle, simnet_id, &attr,
        DLADM_OPT_PERSIST);
    if (status != DLADM_STATUS_OK)
        goto done;

    status = i_dladm_create_simnet(handle, &attr);
    if (status != DLADM_STATUS_OK)
        goto done;

    /*
     * When bringing up check if the peer link is available, if it
     * is then modify the simnet and attach the peer link.
     */
    if ((attr.sna_peer_link_id != DATALINK_INVALID_LINKID) &&
        (dladm_simnet_info(handle, attr.sna_peer_link_id, &peer_attr,
        DLADM_OPT_ACTIVE) == DLADM_STATUS_OK)) {
        status = i_dladm_modify_simnet(handle, &attr);
        if (status != DLADM_STATUS_OK)
            goto done;
    }

    if ((status = dladm_up_datalink_id(handle, simnet_id)) !=
        DLADM_STATUS_OK) {
        (void) dladm_simnet_delete(handle, simnet_id,
            DLADM_OPT_PERSIST);
        goto done;
    }
done:
    *statusp = status;
    return (DLADM_WALK_CONTINUE);
}

/* Bring up simnet instance(s) from configuration */
/* ARGSUSED */
dladm_status_t
dladm_simnet_up(dladm_handle_t handle, datalink_id_t simnet_id,
    uint32_t flags)
{
    dladm_status_t status;

    if (simnet_id == DATALINK_ALL_LINKID) {
        (void) dladm_walk_datalink_id(i_dladm_simnet_up, handle,
            &status, DATALINK_CLASS_SIMNET, DATALINK_ANY_MEDIATYPE,
            DLADM_OPT_PERSIST);
        return (DLADM_STATUS_OK);
    } else {
        (void) i_dladm_simnet_up(handle, simnet_id, &status);
        return (status);
    }
}

/* Bring down a simnet.  Persistent configuration is not changed. */
static int
i_dladm_simnet_down(dladm_handle_t handle, datalink_id_t simnet_id, void *arg)
{
    dladm_status_t *statusp = arg;
    dladm_simnet_attr_t attr;
    dladm_status_t status;

    bzero(&attr, sizeof (attr));
    attr.sna_link_id = simnet_id;

    status = i_dladm_delete_simnet(handle, &attr);
    if (statusp != NULL)
        *statusp = status;
    return (DLADM_WALK_CONTINUE);
}

/*
 * Bring down simnet instance(s).  Persistent configuration and linkid mapping
 * in dlmgmtd is not removed.  Downed simnet instance(s) can be brought up
 * with dladm_simnet_up().
 */
/* ARGSUSED */
dladm_status_t
dladm_simnet_down(dladm_handle_t handle, datalink_id_t simnet_id,
    uint32_t flags)
{
    dladm_status_t status = DLADM_STATUS_OK;

    if (simnet_id == DATALINK_ALL_LINKID) {
        (void) dladm_walk_datalink_id(i_dladm_simnet_down, handle, NULL,
            DATALINK_CLASS_SIMNET, DATALINK_ANY_MEDIATYPE,
            DLADM_OPT_ACTIVE);
    } else {
        (void) i_dladm_simnet_down(handle, simnet_id, &status);
    }
    return (status);
}

/* Store simnet configuration */
static dladm_status_t
dladm_simnet_persist_conf(dladm_handle_t handle, const char *name,
    dladm_simnet_attr_t *attrp)
{
    dladm_conf_t conf;
    dladm_status_t status;
    char mstr[ETHERADDRL * 3];
    uint64_t u64;

    if ((status = dladm_create_conf(handle, name, attrp->sna_link_id,
        DATALINK_CLASS_SIMNET, attrp->sna_type, &conf)) != DLADM_STATUS_OK)
        return (status);

    status = dladm_set_conf_field(handle, conf, FMACADDR,
        DLADM_TYPE_STR, dladm_aggr_macaddr2str(attrp->sna_mac_addr, mstr));
    if (status != DLADM_STATUS_OK)
        goto done;

    u64 = attrp->sna_type;
    status = dladm_set_conf_field(handle, conf, FSIMNETTYPE,
        DLADM_TYPE_UINT64, &u64);
    if (status != DLADM_STATUS_OK)
        goto done;

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

    status = dladm_write_conf(handle, conf, attrp->sna_link_id);
done:
    dladm_destroy_conf(handle, conf);
    return (status);
}