8951f05525
ioctl frontend ports.
This revision introduces two changes to CTL:
- Changes the way options are passed to CTL_LUN_REQ and CTL_PORT_REQ ioctls.
Removes ctl_be_arg structure and associated logic and replaces it with
nv(3)-based logic for passing in and out arguments.
- Allows creating multiple ioctl frontend ports using either ctladm(8) or
ctld(8).
New frontend ports are represented by /dev/cam/ctl<pp>.<vp> nodes, eg /dev/cam/ctl5.3.
Those device nodes respond only to CTL_IO ioctl.
New command-line options for ctladm:
# creates new ioctl frontend port with using free pp and vp=0
ctladm port -c
# creates new ioctl frontend port with pp=10 and vp=0
ctladm port -c -O pp=10
# creates new ioctl frontend port with pp=11 and vp=12
ctladm port -c -O pp=11 -O vp=12
# removes port with number 4 (it's a "targ_port" number, not pp number)
ctladm port -r -p 4
New syntax for ctl.conf:
target ... {
port ioctl/<pp>
...
}
target ... {
port ioctl/<pp>/<vp>
...
Note: Most of this work was made by jceel@, thank you.
Submitted by: jceel
Reworked by: myself
Reviewed by: mav (earlier versions and recently during the rework)
Obtained from: FreeNAS and TrueOS
Relnotes: Yes
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D9299
144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* 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_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 *softc = control_softc;
|
|
struct ctl_backend_driver *be_tmp;
|
|
int error;
|
|
|
|
/* Sanity check, make sure this isn't a duplicate registration. */
|
|
mtx_lock(&softc->ctl_lock);
|
|
STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
|
|
if (strcmp(be_tmp->name, be->name) == 0) {
|
|
mtx_unlock(&softc->ctl_lock);
|
|
return (-1);
|
|
}
|
|
}
|
|
mtx_unlock(&softc->ctl_lock);
|
|
#ifdef CS_BE_CONFIG_MOVE_DONE_IS_NOT_USED
|
|
be->config_move_done = ctl_config_move_done;
|
|
#endif
|
|
be->num_luns = 0;
|
|
|
|
/* Call the backend's initialization routine. */
|
|
if (be->init != NULL) {
|
|
if ((error = be->init()) != 0) {
|
|
printf("%s backend init error: %d\n",
|
|
be->name, error);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
mtx_lock(&softc->ctl_lock);
|
|
STAILQ_INSERT_TAIL(&softc->be_list, be, links);
|
|
softc->num_backends++;
|
|
mtx_unlock(&softc->ctl_lock);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ctl_backend_deregister(struct ctl_backend_driver *be)
|
|
{
|
|
struct ctl_softc *softc = control_softc;
|
|
int error;
|
|
|
|
/* Call the backend's shutdown routine. */
|
|
if (be->shutdown != NULL) {
|
|
if ((error = be->shutdown()) != 0) {
|
|
printf("%s backend shutdown error: %d\n",
|
|
be->name, error);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
mtx_lock(&softc->ctl_lock);
|
|
STAILQ_REMOVE(&softc->be_list, be, ctl_backend_driver, links);
|
|
softc->num_backends--;
|
|
mtx_unlock(&softc->ctl_lock);
|
|
return (0);
|
|
}
|
|
|
|
struct ctl_backend_driver *
|
|
ctl_backend_find(char *backend_name)
|
|
{
|
|
struct ctl_softc *softc = control_softc;
|
|
struct ctl_backend_driver *be_tmp;
|
|
|
|
mtx_lock(&softc->ctl_lock);
|
|
STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
|
|
if (strcmp(be_tmp->name, backend_name) == 0) {
|
|
mtx_unlock(&softc->ctl_lock);
|
|
return (be_tmp);
|
|
}
|
|
}
|
|
mtx_unlock(&softc->ctl_lock);
|
|
|
|
return (NULL);
|
|
}
|
|
|