2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2003 Silicon Graphics International Corp.
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32 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend.c#3 $
35 * CTL backend driver registration routines
37 * Author: Ken Merry <ken@FreeBSD.org>
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/types.h>
44 #include <sys/malloc.h>
46 #include <sys/mutex.h>
47 #include <sys/condvar.h>
48 #include <sys/queue.h>
49 #include <sys/sysctl.h>
51 #include <cam/scsi/scsi_all.h>
52 #include <cam/scsi/scsi_da.h>
53 #include <cam/ctl/ctl_io.h>
54 #include <cam/ctl/ctl.h>
55 #include <cam/ctl/ctl_frontend.h>
56 #include <cam/ctl/ctl_backend.h>
57 #include <cam/ctl/ctl_ioctl.h>
58 #include <cam/ctl/ctl_ha.h>
59 #include <cam/ctl/ctl_private.h>
60 #include <cam/ctl/ctl_debug.h>
62 extern struct ctl_softc *control_softc;
65 ctl_backend_register(struct ctl_backend_driver *be)
67 struct ctl_softc *softc = control_softc;
68 struct ctl_backend_driver *be_tmp;
71 /* Sanity check, make sure this isn't a duplicate registration. */
72 mtx_lock(&softc->ctl_lock);
73 STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
74 if (strcmp(be_tmp->name, be->name) == 0) {
75 mtx_unlock(&softc->ctl_lock);
79 mtx_unlock(&softc->ctl_lock);
80 #ifdef CS_BE_CONFIG_MOVE_DONE_IS_NOT_USED
81 be->config_move_done = ctl_config_move_done;
84 /* Call the backend's initialization routine. */
85 if (be->init != NULL) {
86 if ((error = be->init()) != 0) {
87 printf("%s backend init error: %d\n",
93 mtx_lock(&softc->ctl_lock);
94 STAILQ_INSERT_TAIL(&softc->be_list, be, links);
95 softc->num_backends++;
96 mtx_unlock(&softc->ctl_lock);
101 ctl_backend_deregister(struct ctl_backend_driver *be)
103 struct ctl_softc *softc = control_softc;
106 /* Call the backend's shutdown routine. */
107 if (be->shutdown != NULL) {
108 if ((error = be->shutdown()) != 0) {
109 printf("%s backend shutdown error: %d\n",
115 mtx_lock(&softc->ctl_lock);
116 STAILQ_REMOVE(&softc->be_list, be, ctl_backend_driver, links);
117 softc->num_backends--;
118 mtx_unlock(&softc->ctl_lock);
122 struct ctl_backend_driver *
123 ctl_backend_find(char *backend_name)
125 struct ctl_softc *softc = control_softc;
126 struct ctl_backend_driver *be_tmp;
128 mtx_lock(&softc->ctl_lock);
129 STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
130 if (strcmp(be_tmp->name, backend_name) == 0) {
131 mtx_unlock(&softc->ctl_lock);
135 mtx_unlock(&softc->ctl_lock);