bfa005503c
Overflow reported by Coverity. CID: 1229894 MFC after: 3 days
315 lines
8.6 KiB
C
315 lines
8.6 KiB
C
/*-
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* Copyright (c) 2003 Silicon Graphics International Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend.c#4 $
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*/
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/*
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* CAM Target Layer front end interface code
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*
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* Author: Ken Merry <ken@FreeBSD.org>
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/types.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/endian.h>
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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#include <cam/scsi/scsi_all.h>
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#include <cam/scsi/scsi_da.h>
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#include <cam/ctl/ctl_io.h>
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#include <cam/ctl/ctl.h>
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#include <cam/ctl/ctl_frontend.h>
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#include <cam/ctl/ctl_frontend_internal.h>
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#include <cam/ctl/ctl_backend.h>
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/* XXX KDM move defines from ctl_ioctl.h to somewhere else */
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#include <cam/ctl/ctl_ioctl.h>
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#include <cam/ctl/ctl_ha.h>
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#include <cam/ctl/ctl_private.h>
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#include <cam/ctl/ctl_debug.h>
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extern struct ctl_softc *control_softc;
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int
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ctl_frontend_register(struct ctl_frontend *fe)
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{
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struct ctl_frontend *fe_tmp;
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KASSERT(control_softc != NULL, ("CTL is not initialized"));
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/*
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* Sanity check, make sure this isn't a duplicate registration.
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*/
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mtx_lock(&control_softc->ctl_lock);
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STAILQ_FOREACH(fe_tmp, &control_softc->fe_list, links) {
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if (strcmp(fe_tmp->name, fe->name) == 0) {
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mtx_unlock(&control_softc->ctl_lock);
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return (-1);
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}
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}
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mtx_unlock(&control_softc->ctl_lock);
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STAILQ_INIT(&fe->port_list);
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/*
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* Call the frontend's initialization routine.
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*/
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if (fe->init != NULL)
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fe->init();
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mtx_lock(&control_softc->ctl_lock);
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control_softc->num_frontends++;
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STAILQ_INSERT_TAIL(&control_softc->fe_list, fe, links);
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mtx_unlock(&control_softc->ctl_lock);
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return (0);
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}
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int
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ctl_frontend_deregister(struct ctl_frontend *fe)
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{
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if (!STAILQ_EMPTY(&fe->port_list))
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return (-1);
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mtx_lock(&control_softc->ctl_lock);
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STAILQ_REMOVE(&control_softc->fe_list, fe, ctl_frontend, links);
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control_softc->num_frontends--;
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mtx_unlock(&control_softc->ctl_lock);
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/*
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* Call the frontend's shutdown routine.
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*/
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if (fe->shutdown != NULL)
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fe->shutdown();
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return (0);
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}
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struct ctl_frontend *
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ctl_frontend_find(char *frontend_name)
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{
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struct ctl_softc *ctl_softc = control_softc;
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struct ctl_frontend *fe;
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mtx_lock(&ctl_softc->ctl_lock);
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STAILQ_FOREACH(fe, &ctl_softc->fe_list, links) {
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if (strcmp(fe->name, frontend_name) == 0) {
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mtx_unlock(&ctl_softc->ctl_lock);
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return (fe);
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}
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}
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mtx_unlock(&ctl_softc->ctl_lock);
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return (NULL);
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}
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int
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ctl_port_register(struct ctl_port *port, int master_shelf)
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{
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struct ctl_io_pool *pool;
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int port_num;
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int retval;
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retval = 0;
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KASSERT(control_softc != NULL, ("CTL is not initialized"));
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mtx_lock(&control_softc->ctl_lock);
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port_num = ctl_ffz(control_softc->ctl_port_mask, CTL_MAX_PORTS);
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if ((port_num == -1)
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|| (ctl_set_mask(control_softc->ctl_port_mask, port_num) == -1)) {
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port->targ_port = -1;
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mtx_unlock(&control_softc->ctl_lock);
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return (1);
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}
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control_softc->num_ports++;
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mtx_unlock(&control_softc->ctl_lock);
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/*
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* Initialize the initiator and portname mappings
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*/
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port->max_initiators = CTL_MAX_INIT_PER_PORT;
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port->wwpn_iid = malloc(sizeof(*port->wwpn_iid) * port->max_initiators,
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M_CTL, M_NOWAIT | M_ZERO);
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if (port->wwpn_iid == NULL) {
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retval = ENOMEM;
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goto error;
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}
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/*
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* We add 20 to whatever the caller requests, so he doesn't get
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* burned by queueing things back to the pending sense queue. In
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* theory, there should probably only be one outstanding item, at
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* most, on the pending sense queue for a LUN. We'll clear the
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* pending sense queue on the next command, whether or not it is
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* a REQUEST SENSE.
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*/
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retval = ctl_pool_create(control_softc, CTL_POOL_FETD,
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port->num_requested_ctl_io + 20, &pool);
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if (retval != 0) {
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free(port->wwpn_iid, M_CTL);
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error:
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port->targ_port = -1;
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mtx_lock(&control_softc->ctl_lock);
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ctl_clear_mask(control_softc->ctl_port_mask, port_num);
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mtx_unlock(&control_softc->ctl_lock);
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return (retval);
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}
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port->ctl_pool_ref = pool;
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if (port->options.stqh_first == NULL)
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STAILQ_INIT(&port->options);
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mtx_lock(&control_softc->ctl_lock);
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port->targ_port = port_num + (master_shelf != 0 ? 0 : CTL_MAX_PORTS);
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STAILQ_INSERT_TAIL(&port->frontend->port_list, port, fe_links);
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STAILQ_INSERT_TAIL(&control_softc->port_list, port, links);
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control_softc->ctl_ports[port_num] = port;
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mtx_unlock(&control_softc->ctl_lock);
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return (retval);
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}
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int
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ctl_port_deregister(struct ctl_port *port)
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{
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struct ctl_io_pool *pool;
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int port_num, retval, i;
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retval = 0;
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pool = (struct ctl_io_pool *)port->ctl_pool_ref;
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if (port->targ_port == -1) {
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retval = 1;
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goto bailout;
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}
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mtx_lock(&control_softc->ctl_lock);
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STAILQ_REMOVE(&control_softc->port_list, port, ctl_port, links);
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STAILQ_REMOVE(&port->frontend->port_list, port, ctl_port, fe_links);
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control_softc->num_ports--;
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port_num = (port->targ_port < CTL_MAX_PORTS) ? port->targ_port :
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port->targ_port - CTL_MAX_PORTS;
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ctl_clear_mask(control_softc->ctl_port_mask, port_num);
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control_softc->ctl_ports[port_num] = NULL;
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mtx_unlock(&control_softc->ctl_lock);
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ctl_pool_free(pool);
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ctl_free_opts(&port->options);
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free(port->port_devid, M_CTL);
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port->port_devid = NULL;
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free(port->target_devid, M_CTL);
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port->target_devid = NULL;
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free(port->init_devid, M_CTL);
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port->init_devid = NULL;
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for (i = 0; i < port->max_initiators; i++)
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free(port->wwpn_iid[i].name, M_CTL);
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free(port->wwpn_iid, M_CTL);
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bailout:
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return (retval);
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}
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void
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ctl_port_set_wwns(struct ctl_port *port, int wwnn_valid, uint64_t wwnn,
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int wwpn_valid, uint64_t wwpn)
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{
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struct scsi_vpd_id_descriptor *desc;
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int len, proto;
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if (port->port_type == CTL_PORT_FC)
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proto = SCSI_PROTO_FC << 4;
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else if (port->port_type == CTL_PORT_ISCSI)
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proto = SCSI_PROTO_ISCSI << 4;
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else
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proto = SCSI_PROTO_SPI << 4;
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if (wwnn_valid) {
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port->wwnn = wwnn;
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free(port->target_devid, M_CTL);
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len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN;
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port->target_devid = malloc(sizeof(struct ctl_devid) + len,
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M_CTL, M_WAITOK | M_ZERO);
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port->target_devid->len = len;
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desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data;
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desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY;
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desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET |
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SVPD_ID_TYPE_NAA;
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desc->length = CTL_WWPN_LEN;
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scsi_u64to8b(port->wwnn, desc->identifier);
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}
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if (wwpn_valid) {
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port->wwpn = wwpn;
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free(port->port_devid, M_CTL);
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len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN;
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port->port_devid = malloc(sizeof(struct ctl_devid) + len,
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M_CTL, M_WAITOK | M_ZERO);
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port->port_devid->len = len;
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desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data;
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desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY;
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desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
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SVPD_ID_TYPE_NAA;
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desc->length = CTL_WWPN_LEN;
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scsi_u64to8b(port->wwpn, desc->identifier);
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}
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}
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void
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ctl_port_online(struct ctl_port *port)
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{
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port->port_online(port->onoff_arg);
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/* XXX KDM need a lock here? */
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port->status |= CTL_PORT_STATUS_ONLINE;
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}
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void
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ctl_port_offline(struct ctl_port *port)
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{
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port->port_offline(port->onoff_arg);
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/* XXX KDM need a lock here? */
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port->status &= ~CTL_PORT_STATUS_ONLINE;
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}
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/*
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* vim: ts=8
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*/
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