clients/rdsv3/af_rds.c

	af_rds.c revision b27516f55237249607f754e6e42e865f12456675
/*
 * 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) 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * Copyright (c) 2006 Oracle.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/modctl.h>
#include <sys/rds.h>
#include <sys/stropts.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/sysmacros.h>

#include <inet/ip.h>
#include <net/if_types.h>

#include <sys/ib/clients/rdsv3/rdsv3.h>
#include <sys/ib/clients/rdsv3/rdma.h>
#include <sys/ib/clients/rdsv3/rdma_transport.h>
#include <sys/ib/clients/rdsv3/rdsv3_debug.h>

extern void rdsv3_remove_bound(struct rdsv3_sock *rds);
extern int rdsv3_verify_bind_address(ipaddr_t addr);

extern ddi_taskq_t  *rdsv3_taskq;
extern struct rdma_cm_id *rdsv3_rdma_listen_id;

/* this is just used for stats gathering :/ */
kmutex_t rdsv3_sock_lock;
static unsigned long rdsv3_sock_count;
list_t rdsv3_sock_list;
rdsv3_wait_queue_t rdsv3_poll_waitq;

/*
 * This is called as the final descriptor referencing this socket is closed.
 * We have to unbind the socket so that another socket can be bound to the
 * address it was using.
 *
 * We have to be careful about racing with the incoming path.  sock_orphan()
 * sets SOCK_DEAD and we use that as an indicator to the rx path that new
 * messages shouldn't be queued.
 */
/* ARGSUSED */
static int
rdsv3_release(sock_lower_handle_t proto_handle, int flgs, cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock *rs;

    if (sk == NULL)
        goto out;

    rs = rdsv3_sk_to_rs(sk);
    RDSV3_DPRINTF4("rdsv3_release", "Enter(rs: %p, sk: %p)", rs, sk);

    rdsv3_sk_sock_orphan(sk);
    rdsv3_cong_remove_socket(rs);
    rdsv3_remove_bound(rs);
    /*
     * Note - rdsv3_clear_recv_queue grabs rs_recv_lock, so
     * that ensures the recv path has completed messing
     * with the socket.
     */
    rdsv3_clear_recv_queue(rs);
    rdsv3_send_drop_to(rs, NULL);
    rdsv3_rdma_drop_keys(rs);
    (void) rdsv3_notify_queue_get(rs, NULL);

    mutex_enter(&rdsv3_sock_lock);
    list_remove_node(&rs->rs_item);
    rdsv3_sock_count--;
    mutex_exit(&rdsv3_sock_lock);

    while (sk->sk_refcount > 1) {
        /* wait for 1 sec and try again */
        delay(drv_usectohz(1000000));
    }

    /* this will free the rs and sk */
    rdsv3_sk_sock_put(sk);

    RDSV3_DPRINTF4("rdsv3_release", "Return (rds: %p)", rs);
out:
    return (0);
}

void
__rdsv3_wake_sk_sleep(struct rsock *sk)
{
    /* wakup anyone waiting in recvmsg */
    if (!rdsv3_sk_sock_flag(sk, SOCK_DEAD) && sk->sk_sleep)
        rdsv3_wake_up(sk->sk_sleep);
}

/*
 * Careful not to race with rdsv3_release -> sock_orphan which clears sk_sleep.
 * _bh() isn't OK here, we're called from interrupt handlers.  It's probably OK
 * to wake the waitqueue after sk_sleep is clear as we hold a sock ref, but
 * this seems more conservative.
 * NB - normally, one would use sk_callback_lock for this, but we can
 * get here from interrupts, whereas the network code grabs sk_callback_lock
 * with _lock_bh only - so relying on sk_callback_lock introduces livelocks.
 */
void
rdsv3_wake_sk_sleep(struct rdsv3_sock *rs)
{
    RDSV3_DPRINTF4("rdsv3_wake_sk_sleep", "Enter(rs: %p)", rs);

    rw_enter(&rs->rs_recv_lock, RW_READER);
    __rdsv3_wake_sk_sleep(rdsv3_rs_to_sk(rs));
    rw_exit(&rs->rs_recv_lock);
}

/*ARGSUSED*/
static int
rdsv3_getname(sock_lower_handle_t proto_handle, struct sockaddr *addr,
    socklen_t *addr_len, cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct sockaddr_in *sin = (struct sockaddr_in *)addr;
    struct rdsv3_sock *rs = rdsv3_sk_to_rs(sk);

    RDSV3_DPRINTF4("rdsv3_getname", "Enter(rs: %p, port: %d)", rs,
        rs->rs_bound_port);

    sin->sin_port = rs->rs_bound_port;
    sin->sin_addr.s_addr = rs->rs_bound_addr;

    sin->sin_family = AF_INET_OFFLOAD;

    *addr_len = sizeof (*sin);
    return (0);
}

/*
 * RDS' poll is without a doubt the least intuitive part of the interface,
 * as POLLIN and POLLOUT do not behave entirely as you would expect from
 * a network protocol.
 *
 * POLLIN is asserted if
 *  -   there is data on the receive queue.
 *  -   to signal that a previously congested destination may have become
 *  uncongested
 *  -   A notification has been queued to the socket (this can be a congestion
 *  update, or a RDMA completion).
 *
 * POLLOUT is asserted if there is room on the send queue. This does not mean
 * however, that the next sendmsg() call will succeed. If the application tries
 * to send to a congested destination, the system call may still fail (and
 * return ENOBUFS).
 */
/* ARGSUSED */
static short
rdsv3_poll(sock_lower_handle_t proto_handle, short events, int anyyet,
    cred_t *cr)
{
    struct rsock    *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock   *rs = rdsv3_sk_to_rs(sk);
    unsigned short mask = 0;

#if 0
    RDSV3_DPRINTF4("rdsv3_poll", "enter(%p %x %d)", rs, events, anyyet);
#endif

    /*
     * If rs_seen_congestion is on, wait until it's off.
     * This is implemented for the following OFED code.
     *  if (rs->rs_seen_congestion)
     *      poll_wait(file, &rds_poll_waitq, wait);
     */
    mutex_enter(&rdsv3_poll_waitq.waitq_mutex);
    while (rs->rs_seen_congestion) {
        cv_wait(&rdsv3_poll_waitq.waitq_cv,
            &rdsv3_poll_waitq.waitq_mutex);
    }
    mutex_exit(&rdsv3_poll_waitq.waitq_mutex);

    rw_enter(&rs->rs_recv_lock, RW_READER);
    if (!rs->rs_cong_monitor) {
        /*
         * When a congestion map was updated, we signal POLLIN for
         * "historical" reasons. Applications can also poll for
         * WRBAND instead.
         */
        if (rdsv3_cong_updated_since(&rs->rs_cong_track))
            mask |= (POLLIN | POLLRDNORM | POLLWRBAND);
    } else {
        mutex_enter(&rs->rs_lock);
        if (rs->rs_cong_notify)
            mask |= (POLLIN | POLLRDNORM);
        mutex_exit(&rs->rs_lock);
    }
    if (!list_is_empty(&rs->rs_recv_queue) ||
        !list_is_empty(&rs->rs_notify_queue))
        mask |= (POLLIN | POLLRDNORM);
    if (rs->rs_snd_bytes < rdsv3_sk_sndbuf(rs))
        mask |= (POLLOUT | POLLWRNORM);
    rw_exit(&rs->rs_recv_lock);

    /* clear state any time we wake a seen-congested socket */
    if (mask) {
        mutex_enter(&rdsv3_poll_waitq.waitq_mutex);
        rs->rs_seen_congestion = 0;
        mutex_exit(&rdsv3_poll_waitq.waitq_mutex);
    }

#if 0
    RDSV3_DPRINTF4("rdsv3_poll", "return(%p %x)", rs, mask);
#endif

    return (mask);
}

/* ARGSUSED */
static int
rdsv3_ioctl(sock_lower_handle_t proto_handle, int cmd, intptr_t arg,
    int mode, int32_t *rvalp, cred_t *cr)
{
    ksocket_t   so4;
    struct lifconf  lifc;
    struct lifreq   lifr, *lifrp;
    struct ifconf   ifc;
    struct ifreq    ifr;
    int     rval = 0, rc, len;
    int     numifs;
    int     bufsize;
    void        *buf;

    RDSV3_DPRINTF4("rdsv3_ioctl", "enter: cmd: %d", cmd);

    /* Only ipv4 for now */
    rval = ksocket_socket(&so4, PF_INET, SOCK_DGRAM, 0, KSOCKET_NOSLEEP,
        CRED());
    if (rval != 0) {
        RDSV3_DPRINTF2("rdsv3_ioctl", "ksocket_socket returned %d",
            rval);
        return (rval);
    }

    switch (cmd) {
    case SIOCGLIFNUM :
    case SIOCGIFNUM :
        rval = rdsv3_do_ip_ioctl(so4, &buf, &bufsize, &numifs);
        if (rval != 0) break;
        if (cmd == SIOCGLIFNUM) {
            struct lifnum   lifn;
            lifn.lifn_family = AF_INET_OFFLOAD;
            lifn.lifn_flags = 0;
            lifn.lifn_count = numifs;
            (void) ddi_copyout(&lifn, (void *)arg,
                sizeof (struct lifnum), 0);
        } else {
            len = 0;
            for (lifrp = (struct lifreq *)buf, rc = 0; rc < numifs;
                rc++, lifrp++) {
                if (strlen(lifrp->lifr_name) <= IFNAMSIZ) {
                    len++;
                }
            }
            (void) ddi_copyout(&len, (void *)arg,
                sizeof (int), 0);
        }
        kmem_free(buf, bufsize);
        break;

    case SIOCGLIFCONF :
        if (ddi_copyin((void *)arg, &lifc, sizeof (struct lifconf), 0)
            != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl", "ddi_copyin failed lifc");
            rval = EFAULT;
            break;
        }

        rval = rdsv3_do_ip_ioctl(so4, &buf, &bufsize, &numifs);
        if (rval != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl",
                "rdsv3_do_ip_ioctl failed: %d", rval);
            break;
        }

        if ((lifc.lifc_len > 0) && (numifs > 0)) {
            if (ddi_copyout(buf, (void *)lifc.lifc_req,
                (lifc.lifc_len < bufsize) ? lifc.lifc_len :
                bufsize, 0) != 0) {
                RDSV3_DPRINTF2("rdsv3_ioctl",
                    "copyout of records failed");
                rval = EFAULT;
            }

        }

        lifc.lifc_len = bufsize;
        if (ddi_copyout(&lifc, (void *)arg, sizeof (struct lifconf),
            0) != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl",
                "copyout of lifconf failed");
            rval = EFAULT;
        }

        kmem_free(buf, bufsize);
        break;

    case SIOCGIFCONF :
    case O_SIOCGIFCONF :
        if (ddi_copyin((void *)arg, &ifc, sizeof (struct ifconf), 0)
            != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl", "ddi_copyin failed ifc");
            rval = EFAULT;
            break;
        }

        RDSV3_DPRINTF2("rdsv3_ioctl",
            "O_SIOCGIFCONF: ifc_len: %d, req: %p",
            ifc.ifc_len, ifc.ifc_req);

        rval = rdsv3_do_ip_ioctl_old(so4, &buf, &bufsize, &numifs);
        if (rval != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl",
                "rdsv3_do_ip_ioctl_old failed: %d", rval);
            break;
        }

        if ((ifc.ifc_len > 0) && (numifs > 0)) {
            if (ddi_copyout(buf, (void *)ifc.ifc_req,
                (ifc.ifc_len < bufsize) ? ifc.ifc_len :
                bufsize, 0) != 0) {
                RDSV3_DPRINTF2("rdsv3_ioctl",
                    "copyout of records failed");
                rval = EFAULT;
            }

        }

        ifc.ifc_len = bufsize;
        if (ddi_copyout(&ifc, (void *)arg, sizeof (struct ifconf),
            0) != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl",
                "copyout of ifconf failed");
            rval = EFAULT;
        }

        kmem_free(buf, bufsize);
        break;

    case SIOCGLIFFLAGS :
    case SIOCSLIFFLAGS :
    case SIOCGLIFMTU :
    case SIOCGLIFNETMASK :
    case SIOCGLIFINDEX :
        if (ddi_copyin((void *)arg, &lifr, sizeof (struct lifreq), 0)
            != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl", "ddi_copyin failed lifr");
            rval = EFAULT;
            break;
        }

        rc = ksocket_ioctl(so4, cmd, (intptr_t)&lifr, &rval, CRED());
        if (rc != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl",
                "ksocket_ioctl failed: %d, name: %s cmd: 0x%x",
                rc, lifr.lifr_name, cmd);
            break;
        }

        (void) ddi_copyout(&lifr, (void *)arg,
            sizeof (struct lifreq), 0);
        break;

    case SIOCGIFFLAGS :
    case SIOCSIFFLAGS :
    case SIOCGIFMTU :
    case SIOCGIFNETMASK :
    case SIOCGIFINDEX :
        if (ddi_copyin((void *)arg, &ifr, sizeof (struct ifreq), 0)
            != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl", "ddi_copyin failed ifr");
            rval = EFAULT;
            break;
        }

        RDSV3_DPRINTF2("rdsv3_ioctl", "1. name: %s", ifr.ifr_name);

        rc = ksocket_ioctl(so4, cmd, (intptr_t)&ifr, &rval, CRED());
        if (rc != 0) {
            RDSV3_DPRINTF2("rdsv3_ioctl",
                "ksocket_ioctl failed: %d, name: %s cmd: 0x%x",
                rc, ifr.ifr_name, cmd);

            break;
        }

        RDSV3_DPRINTF2("rdsv3_ioctl", "2. name: %s", ifr.ifr_name);

        (void) ddi_copyout(&ifr, (void *)arg,
            sizeof (struct ifreq), 0);
        break;

    default:
        if ((cmd >= RDSV3_INFO_FIRST) &&
            (cmd <= RDSV3_INFO_LAST)) {
            return (rdsv3_info_ioctl((struct rsock *)proto_handle,
                cmd, (char *)arg, rvalp));
        }
        RDSV3_DPRINTF2("rdsv3_ioctl", "Unknown ioctl cmd: %d",  cmd);
        cmn_err(CE_CONT, "unsupported IOCTL cmd: %d \n", cmd);
        rval = EOPNOTSUPP;
    }

    (void) ksocket_close(so4, CRED());

    RDSV3_DPRINTF4("rdsv3_ioctl", "return: %d cmd: %d", rval, cmd);

    *rvalp = rval;
    return (rval);
}

static int
rdsv3_cancel_sent_to(struct rdsv3_sock *rs, char *optval, int len)
{
    struct sockaddr_in sin;

    /* racing with another thread binding seems ok here */
    if (rs->rs_bound_addr == 0)
        return (-ENOTCONN); /* XXX not a great errno */

    if (len < sizeof (struct sockaddr_in))
        return (-EINVAL);

    if (ddi_copyin((void *)optval, &sin, sizeof (struct sockaddr_in),
        0) != 0) {
        RDSV3_DPRINTF2("rdsv3_cancel_sent_to", "ddi_copyin failed sin");
        return (-EFAULT);
    }

    rdsv3_send_drop_to(rs, &sin);

    return (0);
}

static int
rdsv3_set_bool_option(unsigned char *optvar, char *optval, int optlen)
{
    int value = *optval;

    if (optlen < sizeof (int))
        return (-EINVAL);
    *optvar = !!value;
    return (0);
}

static int
rdsv3_cong_monitor(struct rdsv3_sock *rs, char *optval, int optlen)
{
    int ret;

    ret = rdsv3_set_bool_option(&rs->rs_cong_monitor, optval, optlen);
    if (ret == 0) {
        if (rs->rs_cong_monitor) {
            rdsv3_cong_add_socket(rs);
        } else {
            rdsv3_cong_remove_socket(rs);
            rs->rs_cong_mask = 0;
            rs->rs_cong_notify = 0;
        }
    }
    return (ret);
}

/*ARGSUSED*/
static int
rdsv3_setsockopt(sock_lower_handle_t proto_handle, int level,
    int optname, const void *optval, socklen_t optlen, cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock   *rs = rdsv3_sk_to_rs(sk);
    int ret = 0;

    RDSV3_DPRINTF4("rdsv3_setsockopt", "enter(%p %d %d)",
        rs, level, optname);

    switch (optname) {
    case RDSV3_CANCEL_SENT_TO:
        ret = rdsv3_cancel_sent_to(rs, (char *)optval, optlen);
        break;
    case RDSV3_GET_MR:
        ret = rdsv3_get_mr(rs, optval, optlen);
        break;
    case RDSV3_GET_MR_FOR_DEST:
        ret = rdsv3_get_mr_for_dest(rs, optval, optlen);
        break;
    case RDSV3_FREE_MR:
        ret = rdsv3_free_mr(rs, optval, optlen);
        break;
    case RDSV3_RECVERR:
        ret = rdsv3_set_bool_option(&rs->rs_recverr,
            (char *)optval, optlen);
        break;
    case RDSV3_CONG_MONITOR:
        ret = rdsv3_cong_monitor(rs, (char *)optval, optlen);
        break;
    case SO_SNDBUF:
        sk->sk_sndbuf = *(uint_t *)optval;
        return (ret);
    case SO_RCVBUF:
        sk->sk_rcvbuf = *(uint_t *)optval;
        return (ret);
    default:
#if 1
        break;
#else
        ret = -ENOPROTOOPT;
#endif
    }
out:
    return (ret);
}

/* XXX */
/*ARGSUSED*/
static int
rdsv3_getsockopt(sock_lower_handle_t proto_handle, int level,
    int optname, void *optval, socklen_t *optlen, cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock   *rs = rdsv3_sk_to_rs(sk);
    int ret = 0;

    RDSV3_DPRINTF4("rdsv3_getsockopt", "enter(%p %d %d)",
        rs, optname, *optlen);

    switch (optname) {
    case SO_SNDBUF:
        RDSV3_DPRINTF4("rdsv3_getsockopt", "SO_SNDBUF(%d)",
            sk->sk_sndbuf);
        if (*optlen != 0) {
            *((int *)optval) = sk->sk_sndbuf;
            *optlen = sizeof (uint_t);
        }
        return (ret);
    case SO_RCVBUF:
        RDSV3_DPRINTF4("rdsv3_getsockopt", "SO_RCVBUF(%d)",
            sk->sk_rcvbuf);
        if (*optlen != 0) {
            *((int *)optval) = sk->sk_rcvbuf;
            *optlen = sizeof (uint_t);
        }
        return (ret);
    case RDSV3_RECVERR:
        RDSV3_DPRINTF4("rdsv3_getsockopt", "RDSV3_RECVERR(%d)",
            rs->rs_recverr);
        if (*optlen < sizeof (int))
            return (-EINVAL);
        else {
            *(int *)optval = rs->rs_recverr;
            *optlen = sizeof (int);
        }
        return (0);
    default:
        RDSV3_DPRINTF2("rdsv3_getsockopt",
            "Unknown: level: %d optname: %d", level, optname);
        ret = -ENOPROTOOPT;
    }

    RDSV3_DPRINTF4("rdsv3_getsockopt", "return(%p %d %d)",
        rs, optname, ret);
    return (ret);
}

/*ARGSUSED*/
static int rdsv3_connect(sock_lower_handle_t proto_handle,
    const struct sockaddr *addr, socklen_t addr_len, sock_connid_t *conn,
    cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct sockaddr_in *sin = (struct sockaddr_in *)addr;
    struct rdsv3_sock   *rs = rdsv3_sk_to_rs(sk);
    int ret = 0;

    RDSV3_DPRINTF4("rdsv3_connect", "Enter(rs: %p)", rs);

    mutex_enter(&sk->sk_lock);

    if (addr_len != sizeof (struct sockaddr_in)) {
        ret = -EINVAL;
        goto out;
    }

    if (sin->sin_family != AF_INET_OFFLOAD) {
        ret = -EAFNOSUPPORT;
        goto out;
    }

    if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) {
        ret = -EDESTADDRREQ;
        goto out;
    }

    rs->rs_conn_addr = sin->sin_addr.s_addr;
    rs->rs_conn_port = sin->sin_port;

    sk->sk_upcalls->su_connected(sk->sk_upper_handle, 0, NULL, -1);

    RDSV3_DPRINTF4("rdsv3_connect", "Return(rs: %p)", rs);

out:
    mutex_exit(&sk->sk_lock);
    return (ret);
}

/*ARGSUSED*/
static int
rdsv3_shutdown(sock_lower_handle_t proto_handle, int how, cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock *rs = rdsv3_sk_to_rs(sk);

    RDSV3_DPRINTF4("rdsv3_shutdown", "Enter(rs: %p)", rs);

    return (0);
}

/*ARGSUSED*/
void
rdsv3_activate(sock_lower_handle_t proto_handle,
    sock_upper_handle_t sock_handle, sock_upcalls_t *sock_upcalls,
    int flags, cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock *rs = rdsv3_sk_to_rs(sk);

    RDSV3_DPRINTF4("rdsv3_activate", "Enter(rs: %p)", rs);

    sk->sk_upcalls = sock_upcalls;
    sk->sk_upper_handle = sock_handle;

    RDSV3_DPRINTF4("rdsv3_activate", "Return (rs: %p)", rs);
}


/* ARGSUSED */
int
rdsv3_send_uio(sock_lower_handle_t proto_handle, uio_t *uio,
    struct nmsghdr *msg, cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock *rs = rdsv3_sk_to_rs(sk);
    int ret;

    RDSV3_DPRINTF4("rdsv3_send_uio", "Enter(rs: %p)", rs);
    ret = rdsv3_sendmsg(rs, uio, msg, uio->uio_resid);

    RDSV3_DPRINTF4("rdsv3_send_uio", "Return(rs: %p ret %d)", rs, ret);
    if (ret < 0) {
        return (-ret);
    }

    return (0);
}

/* ARGSUSED */
int
rdsv3_recv_uio(sock_lower_handle_t proto_handle, uio_t *uio,
    struct nmsghdr *msg, cred_t *cr)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock *rs = rdsv3_sk_to_rs(sk);
    int ret;

    RDSV3_DPRINTF4("rdsv3_recv_uio", "Enter (rs: %p)", rs);
    ret = rdsv3_recvmsg(rs, uio, msg, uio->uio_resid, msg->msg_flags);

    RDSV3_DPRINTF4("rdsv3_recv_uio", "Return(rs: %p ret %d)", rs, ret);

    if (ret < 0) {
        return (-ret);
    }

    return (0);
}

/*ARGSUSED*/
int
rdsv3_getpeername(sock_lower_handle_t  proto_handle, struct sockaddr *addr,
    socklen_t *addr_len, cred_t *cr)
{
    struct sockaddr_in *sin = (struct sockaddr_in *)addr;
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock *rs = rdsv3_sk_to_rs(sk);

    RDSV3_DPRINTF2("rdsv3_getpeername", "enter(rs: %p)", rs);

    (void) memset(sin->sin_zero, 0, sizeof (sin->sin_zero));

    /* racey, don't care */
    if (!rs->rs_conn_addr)
        return (-ENOTCONN);

    sin->sin_port = rs->rs_conn_port;
    sin->sin_addr.s_addr = rs->rs_conn_addr;

    sin->sin_family = AF_INET_OFFLOAD;

    *addr_len = sizeof (*sin);
    return (0);
}

void
rdsv3_clrflowctrl(sock_lower_handle_t proto_handle)
{
    struct rsock *sk = (struct rsock *)proto_handle;
    struct rdsv3_sock *rs = rdsv3_sk_to_rs(sk);

    RDSV3_DPRINTF2("rdsv3_clrflowctrl", "enter(rs: %p)", rs);
}

#ifndef __lock_lint
static struct sock_downcalls_s rdsv3_sock_downcalls = {
    .sd_close =     rdsv3_release,
    .sd_bind =      rdsv3_bind,
    .sd_connect =       rdsv3_connect,
    .sd_accept =        NULL,
    .sd_getsockname =   rdsv3_getname,
    .sd_poll =      rdsv3_poll,
    .sd_ioctl =     rdsv3_ioctl,
    .sd_listen =        NULL,
    .sd_shutdown =      rdsv3_shutdown,
    .sd_setsockopt =    rdsv3_setsockopt,
    .sd_getsockopt =    rdsv3_getsockopt,
    .sd_send_uio =      rdsv3_send_uio,
    .sd_recv_uio =      rdsv3_recv_uio,
    .sd_activate =      rdsv3_activate,
    .sd_getpeername =   rdsv3_getpeername,
    .sd_send =      NULL,
    .sd_clr_flowctrl =  NULL
};
#else
static struct sock_downcalls_s rdsv3_sock_downcalls = {
    rdsv3_activate,
    NULL,
    rdsv3_bind,
    NULL,
    rdsv3_connect,
    rdsv3_getpeername,
    rdsv3_getname,
    rdsv3_getsockopt,
    rdsv3_setsockopt,
    NULL,
    rdsv3_send_uio,
    rdsv3_recv_uio,
    rdsv3_poll,
    rdsv3_shutdown,
    NULL,
    rdsv3_ioctl,
    rdsv3_release
};
#endif

sock_lower_handle_t
rdsv3_create(int family, int type, int proto, sock_downcalls_t **sock_downcalls,
    uint_t *smodep, int *errorp, int flags, cred_t *credp)
{
    struct rdsv3_sock   *rs;
    struct rsock        *sk;

    RDSV3_DPRINTF4("rdsv3_create", "Enter (family: %d type: %d, proto: %d "
        "flags: %d", family, type, proto, flags);

    sk = rdsv3_sk_alloc();
    if (sk == NULL)
        return (NULL);
    rdsv3_sock_init_data(sk);

    rs = rdsv3_sk_to_rs(sk);
    rs->rs_sk = sk;
    mutex_init(&rs->rs_lock, NULL, MUTEX_DRIVER, NULL);
    rw_init(&rs->rs_recv_lock, NULL, RW_DRIVER, NULL);
    list_create(&rs->rs_send_queue, sizeof (struct rdsv3_message),
        offsetof(struct rdsv3_message, m_sock_item));
    list_create(&rs->rs_recv_queue, sizeof (struct rdsv3_incoming),
        offsetof(struct rdsv3_incoming, i_item));
    list_create(&rs->rs_notify_queue, sizeof (struct rdsv3_notifier),
        offsetof(struct rdsv3_notifier, n_list));
    mutex_init(&rs->rs_rdma_lock, NULL, MUTEX_DRIVER, NULL);
    avl_create(&rs->rs_rdma_keys, rdsv3_mr_compare,
        sizeof (struct rdsv3_mr), offsetof(struct rdsv3_mr, r_rb_node));
    mutex_init(&rs->rs_conn_lock, NULL, MUTEX_DRIVER, NULL);
    rs->rs_cred = credp;
    rs->rs_zoneid = getzoneid();
    crhold(credp);

    mutex_enter(&rdsv3_sock_lock);
    list_insert_tail(&rdsv3_sock_list, rs);
    rdsv3_sock_count++;
    /* Initialize RDMA/IB on the 1st socket if not done at attach */
    if (rdsv3_sock_count == 1) {
        rdsv3_rdma_init();
    }
    mutex_exit(&rdsv3_sock_lock);

    *errorp = 0;
    *smodep = SM_ATOMIC;
    *sock_downcalls = &rdsv3_sock_downcalls;

    RDSV3_DPRINTF4("rdsv3_create", "Return: %p", rs);

    return ((sock_lower_handle_t)rdsv3_rs_to_sk(rs));
}

void
rdsv3_sock_addref(struct rdsv3_sock *rs)
{
    RDSV3_DPRINTF4("rdsv3_sock_addref", "Enter(rs: %p)", rs);
    rdsv3_sk_sock_hold(rdsv3_rs_to_sk(rs));
}

void
rdsv3_sock_put(struct rdsv3_sock *rs)
{
    RDSV3_DPRINTF4("rdsv3_sock_put", "Enter(rs: %p)", rs);
    rdsv3_sk_sock_put(rdsv3_rs_to_sk(rs));
}

static void
rdsv3_sock_inc_info(struct rsock *sock, unsigned int len,
    struct rdsv3_info_iterator *iter, struct rdsv3_info_lengths *lens)
{
    struct rdsv3_sock *rs;
    struct rdsv3_incoming *inc;
    unsigned int total = 0;

    RDSV3_DPRINTF4("rdsv3_sock_inc_info", "Enter(rs: %p)",
        rdsv3_sk_to_rs(sock));

    len /= sizeof (struct rdsv3_info_message);

    mutex_enter(&rdsv3_sock_lock);

    RDSV3_FOR_EACH_LIST_NODE(rs, &rdsv3_sock_list, rs_item) {
        rw_enter(&rs->rs_recv_lock, RW_READER);

        /* XXX too lazy to maintain counts.. */
        RDSV3_FOR_EACH_LIST_NODE(inc, &rs->rs_recv_queue, i_item) {
            total++;
            if (total <= len)
                rdsv3_inc_info_copy(inc, iter, inc->i_saddr,
                    rs->rs_bound_addr, 1);
        }

        rw_exit(&rs->rs_recv_lock);
    }

    mutex_exit(&rdsv3_sock_lock);

    lens->nr = total;
    lens->each = sizeof (struct rdsv3_info_message);

    RDSV3_DPRINTF4("rdsv3_sock_inc_info", "return(rs: %p)",
        rdsv3_sk_to_rs(sock));
}

static void
rdsv3_sock_info(struct rsock *sock, unsigned int len,
    struct rdsv3_info_iterator *iter, struct rdsv3_info_lengths *lens)
{
    struct rdsv3_info_socket sinfo;
    struct rdsv3_sock *rs;
    unsigned long bytes;

    RDSV3_DPRINTF4("rdsv3_sock_info", "Enter(rs: %p)",
        rdsv3_sk_to_rs(sock));

    len /= sizeof (struct rdsv3_info_socket);

    mutex_enter(&rdsv3_sock_lock);

    if ((len < rdsv3_sock_count) || (iter->addr == NULL))
        goto out;

    bytes = sizeof (struct rdsv3_info_socket);
    RDSV3_FOR_EACH_LIST_NODE(rs, &rdsv3_sock_list, rs_item) {
        sinfo.sndbuf = rdsv3_sk_sndbuf(rs);
        sinfo.rcvbuf = rdsv3_sk_rcvbuf(rs);
        sinfo.bound_addr = rs->rs_bound_addr;
        sinfo.connected_addr = rs->rs_conn_addr;
        sinfo.bound_port = rs->rs_bound_port;
        sinfo.connected_port = rs->rs_conn_port;

        rdsv3_info_copy(iter, &sinfo, bytes);
    }

    RDSV3_DPRINTF4("rdsv3_sock_info", "Return(rs: %p)",
        rdsv3_sk_to_rs(sock));

out:
    lens->nr = rdsv3_sock_count;
    lens->each = sizeof (struct rdsv3_info_socket);

    mutex_exit(&rdsv3_sock_lock);
}

rdsv3_delayed_work_t    *rdsv3_rdma_dwp = NULL;
uint_t          rdsv3_rdma_init_delay = 5; /* secs */
extern void rdsv3_rdma_init_worker(struct rdsv3_work_s *work);

void
rdsv3_exit(void)
{
    RDSV3_DPRINTF4("rdsv3_exit", "Enter");

    if (rdsv3_rdma_dwp) {
        rdsv3_cancel_delayed_work(rdsv3_rdma_dwp);
    }

    (void) ddi_taskq_dispatch(rdsv3_taskq, rdsv3_rdma_exit,
        NULL, DDI_SLEEP);
    while (rdsv3_rdma_listen_id != NULL) {
#ifndef __lock_lint
        RDSV3_DPRINTF5("rdsv3", "%s-%d Waiting for rdsv3_rdma_exit",
            __func__, __LINE__);
#endif
        delay(drv_usectohz(1000));
    }

    rdsv3_conn_exit();
    rdsv3_cong_exit();
    rdsv3_sysctl_exit();
    rdsv3_threads_exit();
    rdsv3_stats_exit();
    rdsv3_info_deregister_func(RDSV3_INFO_SOCKETS, rdsv3_sock_info);
    rdsv3_info_deregister_func(RDSV3_INFO_RECV_MESSAGES,
        rdsv3_sock_inc_info);

    if (rdsv3_rdma_dwp) {
        kmem_free(rdsv3_rdma_dwp, sizeof (rdsv3_delayed_work_t));
        rdsv3_rdma_dwp = NULL;
    }

    RDSV3_DPRINTF4("rdsv3_exit", "Return");
}

/*ARGSUSED*/
int
rdsv3_init()
{
    int ret;

    RDSV3_DPRINTF4("rdsv3_init", "Enter");

    rdsv3_cong_init();

    ret = rdsv3_conn_init();
    if (ret)
        goto out;
    ret = rdsv3_threads_init();
    if (ret)
        goto out_conn;
    ret = rdsv3_sysctl_init();
    if (ret)
        goto out_threads;
    ret = rdsv3_stats_init();
    if (ret)
        goto out_sysctl;

    rdsv3_info_register_func(RDSV3_INFO_SOCKETS, rdsv3_sock_info);
    rdsv3_info_register_func(RDSV3_INFO_RECV_MESSAGES, rdsv3_sock_inc_info);

    /* rdsv3_rdma_init need to be called with a little delay */
    rdsv3_rdma_dwp = kmem_zalloc(sizeof (rdsv3_delayed_work_t), KM_SLEEP);
    RDSV3_INIT_DELAYED_WORK(rdsv3_rdma_dwp, rdsv3_rdma_init_worker);
    rdsv3_queue_delayed_work(rdsv3_wq, rdsv3_rdma_dwp,
        rdsv3_rdma_init_delay);

    RDSV3_DPRINTF4("rdsv3_init", "Return");

    goto out;

out_stats:
    rdsv3_stats_exit();
out_sysctl:
    rdsv3_sysctl_exit();
out_threads:
    rdsv3_threads_exit();
out_conn:
    rdsv3_conn_exit();
    rdsv3_cong_exit();
out:
    return (ret);
}