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0c629e2884
It is only a first step and not perfect, but better then nothing. The main blocker is CAM target frontend, that can not be unloaded, since CAM does not have mechanism to unregister periph driver now. MFC after: 2 weeks
232 lines
5.9 KiB
C
232 lines
5.9 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_backend.c#3 $
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*/
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/*
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* CTL backend driver registration routines
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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/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_backend.h>
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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_backend_register(struct ctl_backend_driver *be)
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{
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struct ctl_softc *softc = control_softc;
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struct ctl_backend_driver *be_tmp;
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int error;
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/* Sanity check, make sure this isn't a duplicate registration. */
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mtx_lock(&softc->ctl_lock);
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STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
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if (strcmp(be_tmp->name, be->name) == 0) {
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mtx_unlock(&softc->ctl_lock);
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return (-1);
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}
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}
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mtx_unlock(&softc->ctl_lock);
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#ifdef CS_BE_CONFIG_MOVE_DONE_IS_NOT_USED
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be->config_move_done = ctl_config_move_done;
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#endif
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be->num_luns = 0;
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/* Call the backend's initialization routine. */
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if (be->init != NULL) {
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if ((error = be->init()) != 0) {
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printf("%s backend init error: %d\n",
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be->name, error);
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return (error);
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}
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}
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mtx_lock(&softc->ctl_lock);
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STAILQ_INSERT_TAIL(&softc->be_list, be, links);
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softc->num_backends++;
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mtx_unlock(&softc->ctl_lock);
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return (0);
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}
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int
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ctl_backend_deregister(struct ctl_backend_driver *be)
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{
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struct ctl_softc *softc = control_softc;
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int error;
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/* Call the backend's shutdown routine. */
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if (be->shutdown != NULL) {
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if ((error = be->shutdown()) != 0) {
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printf("%s backend shutdown error: %d\n",
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be->name, error);
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return (error);
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}
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}
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mtx_lock(&softc->ctl_lock);
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STAILQ_REMOVE(&softc->be_list, be, ctl_backend_driver, links);
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softc->num_backends--;
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mtx_unlock(&softc->ctl_lock);
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return (0);
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}
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struct ctl_backend_driver *
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ctl_backend_find(char *backend_name)
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{
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struct ctl_softc *softc = control_softc;
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struct ctl_backend_driver *be_tmp;
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mtx_lock(&softc->ctl_lock);
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STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
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if (strcmp(be_tmp->name, backend_name) == 0) {
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mtx_unlock(&softc->ctl_lock);
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return (be_tmp);
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}
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}
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mtx_unlock(&softc->ctl_lock);
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return (NULL);
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}
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void
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ctl_init_opts(ctl_options_t *opts, int num_args, struct ctl_be_arg *args)
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{
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struct ctl_option *opt;
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int i;
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STAILQ_INIT(opts);
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for (i = 0; i < num_args; i++) {
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if ((args[i].flags & CTL_BEARG_RD) == 0)
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continue;
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if ((args[i].flags & CTL_BEARG_ASCII) == 0)
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continue;
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opt = malloc(sizeof(*opt), M_CTL, M_WAITOK);
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opt->name = strdup(args[i].kname, M_CTL);
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opt->value = strdup(args[i].kvalue, M_CTL);
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STAILQ_INSERT_TAIL(opts, opt, links);
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}
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}
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void
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ctl_update_opts(ctl_options_t *opts, int num_args, struct ctl_be_arg *args)
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{
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struct ctl_option *opt;
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int i;
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for (i = 0; i < num_args; i++) {
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if ((args[i].flags & CTL_BEARG_RD) == 0)
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continue;
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if ((args[i].flags & CTL_BEARG_ASCII) == 0)
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continue;
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STAILQ_FOREACH(opt, opts, links) {
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if (strcmp(opt->name, args[i].kname) == 0)
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break;
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}
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if (args[i].kvalue != NULL &&
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((char *)args[i].kvalue)[0] != 0) {
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if (opt) {
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free(opt->value, M_CTL);
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opt->value = strdup(args[i].kvalue, M_CTL);
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} else {
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opt = malloc(sizeof(*opt), M_CTL, M_WAITOK);
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opt->name = strdup(args[i].kname, M_CTL);
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opt->value = strdup(args[i].kvalue, M_CTL);
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STAILQ_INSERT_TAIL(opts, opt, links);
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}
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} else if (opt) {
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STAILQ_REMOVE(opts, opt, ctl_option, links);
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free(opt->name, M_CTL);
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free(opt->value, M_CTL);
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free(opt, M_CTL);
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}
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}
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}
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void
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ctl_free_opts(ctl_options_t *opts)
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{
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struct ctl_option *opt;
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while ((opt = STAILQ_FIRST(opts)) != NULL) {
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STAILQ_REMOVE_HEAD(opts, links);
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free(opt->name, M_CTL);
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free(opt->value, M_CTL);
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free(opt, M_CTL);
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}
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}
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char *
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ctl_get_opt(ctl_options_t *opts, const char *name)
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{
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struct ctl_option *opt;
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STAILQ_FOREACH(opt, opts, links) {
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if (strcmp(opt->name, name) == 0) {
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return (opt->value);
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}
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}
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return (NULL);
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}
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int
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ctl_get_opt_number(ctl_options_t *opts, const char *name, uint64_t *val)
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{
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const char *value;
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value = ctl_get_opt(opts, name);
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if (value == NULL)
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return (-2);
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return (ctl_expand_number(value, val));
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}
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