mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-27 11:55:06 +00:00
8ed9860914
and kern.cam.ctl.disable tunable; those were introduced as a workaround to make it possible to boot GENERIC on low memory machines. With ctl(4) being built as a module and automatically loaded by ctladm(8), this makes CTL work out of the box. Reviewed by: ken Sponsored by: FreeBSD Foundation
179 lines
4.4 KiB
C
179 lines
4.4 KiB
C
/*-
|
|
* Copyright (c) 2003 Silicon Graphics International Corp.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
|
* including a substantially similar Disclaimer requirement for further
|
|
* binary redistribution.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
|
*
|
|
* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend.c#3 $
|
|
*/
|
|
/*
|
|
* CTL backend driver registration routines
|
|
*
|
|
* Author: Ken Merry <ken@FreeBSD.org>
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/types.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/condvar.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <cam/scsi/scsi_all.h>
|
|
#include <cam/scsi/scsi_da.h>
|
|
#include <cam/ctl/ctl_io.h>
|
|
#include <cam/ctl/ctl.h>
|
|
#include <cam/ctl/ctl_frontend.h>
|
|
#include <cam/ctl/ctl_backend.h>
|
|
#include <cam/ctl/ctl_frontend_internal.h>
|
|
#include <cam/ctl/ctl_ioctl.h>
|
|
#include <cam/ctl/ctl_ha.h>
|
|
#include <cam/ctl/ctl_private.h>
|
|
#include <cam/ctl/ctl_debug.h>
|
|
|
|
extern struct ctl_softc *control_softc;
|
|
|
|
int
|
|
ctl_backend_register(struct ctl_backend_driver *be)
|
|
{
|
|
struct ctl_softc *ctl_softc;
|
|
struct ctl_backend_driver *be_tmp;
|
|
|
|
ctl_softc = control_softc;
|
|
|
|
mtx_lock(&ctl_softc->ctl_lock);
|
|
/*
|
|
* Sanity check, make sure this isn't a duplicate registration.
|
|
*/
|
|
STAILQ_FOREACH(be_tmp, &ctl_softc->be_list, links) {
|
|
if (strcmp(be_tmp->name, be->name) == 0) {
|
|
mtx_unlock(&ctl_softc->ctl_lock);
|
|
return (-1);
|
|
}
|
|
}
|
|
mtx_unlock(&ctl_softc->ctl_lock);
|
|
|
|
/*
|
|
* Call the backend's initialization routine.
|
|
*/
|
|
be->init();
|
|
|
|
mtx_lock(&ctl_softc->ctl_lock);
|
|
|
|
STAILQ_INSERT_TAIL(&ctl_softc->be_list, be, links);
|
|
|
|
ctl_softc->num_backends++;
|
|
|
|
/*
|
|
* Don't want to increment the usage count for internal consumers,
|
|
* we won't be able to unload otherwise.
|
|
*/
|
|
/* XXX KDM find a substitute for this? */
|
|
#if 0
|
|
if ((be->flags & CTL_BE_FLAG_INTERNAL) == 0)
|
|
MOD_INC_USE_COUNT;
|
|
#endif
|
|
|
|
#ifdef CS_BE_CONFIG_MOVE_DONE_IS_NOT_USED
|
|
be->config_move_done = ctl_config_move_done;
|
|
#endif
|
|
/* XXX KDM fix this! */
|
|
be->num_luns = 0;
|
|
#if 0
|
|
atomic_set(&be->num_luns, 0);
|
|
#endif
|
|
|
|
mtx_unlock(&ctl_softc->ctl_lock);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ctl_backend_deregister(struct ctl_backend_driver *be)
|
|
{
|
|
struct ctl_softc *ctl_softc;
|
|
|
|
ctl_softc = control_softc;
|
|
|
|
mtx_lock(&ctl_softc->ctl_lock);
|
|
|
|
#if 0
|
|
if (atomic_read(&be->num_luns) != 0) {
|
|
#endif
|
|
/* XXX KDM fix this! */
|
|
if (be->num_luns != 0) {
|
|
mtx_unlock(&ctl_softc->ctl_lock);
|
|
return (-1);
|
|
}
|
|
|
|
STAILQ_REMOVE(&ctl_softc->be_list, be, ctl_backend_driver, links);
|
|
|
|
ctl_softc->num_backends--;
|
|
|
|
/* XXX KDM find a substitute for this? */
|
|
#if 0
|
|
if ((be->flags & CTL_BE_FLAG_INTERNAL) == 0)
|
|
MOD_DEC_USE_COUNT;
|
|
#endif
|
|
|
|
mtx_unlock(&ctl_softc->ctl_lock);
|
|
|
|
return (0);
|
|
}
|
|
|
|
struct ctl_backend_driver *
|
|
ctl_backend_find(char *backend_name)
|
|
{
|
|
struct ctl_softc *ctl_softc;
|
|
struct ctl_backend_driver *be_tmp;
|
|
|
|
ctl_softc = control_softc;
|
|
|
|
mtx_lock(&ctl_softc->ctl_lock);
|
|
|
|
STAILQ_FOREACH(be_tmp, &ctl_softc->be_list, links) {
|
|
if (strcmp(be_tmp->name, backend_name) == 0) {
|
|
mtx_unlock(&ctl_softc->ctl_lock);
|
|
return (be_tmp);
|
|
}
|
|
}
|
|
|
|
mtx_unlock(&ctl_softc->ctl_lock);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* vim: ts=8
|
|
*/
|