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/cdefs.h>
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/types.h>
45 #include <sys/malloc.h>
47 #include <sys/mutex.h>
48 #include <sys/condvar.h>
49 #include <sys/queue.h>
50 #include <sys/sysctl.h>
52 #include <cam/scsi/scsi_all.h>
53 #include <cam/scsi/scsi_da.h>
54 #include <cam/ctl/ctl_io.h>
55 #include <cam/ctl/ctl.h>
56 #include <cam/ctl/ctl_frontend.h>
57 #include <cam/ctl/ctl_backend.h>
58 #include <cam/ctl/ctl_ioctl.h>
59 #include <cam/ctl/ctl_ha.h>
60 #include <cam/ctl/ctl_private.h>
61 #include <cam/ctl/ctl_debug.h>
63 extern struct ctl_softc *control_softc;
66 ctl_backend_register(struct ctl_backend_driver *be)
68 struct ctl_softc *softc = control_softc;
69 struct ctl_backend_driver *be_tmp;
72 /* Sanity check, make sure this isn't a duplicate registration. */
73 mtx_lock(&softc->ctl_lock);
74 STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
75 if (strcmp(be_tmp->name, be->name) == 0) {
76 mtx_unlock(&softc->ctl_lock);
80 mtx_unlock(&softc->ctl_lock);
81 #ifdef CS_BE_CONFIG_MOVE_DONE_IS_NOT_USED
82 be->config_move_done = ctl_config_move_done;
85 /* Call the backend's initialization routine. */
86 if (be->init != NULL) {
87 if ((error = be->init()) != 0) {
88 printf("%s backend init error: %d\n",
94 mtx_lock(&softc->ctl_lock);
95 STAILQ_INSERT_TAIL(&softc->be_list, be, links);
96 softc->num_backends++;
97 mtx_unlock(&softc->ctl_lock);
102 ctl_backend_deregister(struct ctl_backend_driver *be)
104 struct ctl_softc *softc = control_softc;
107 /* Call the backend's shutdown routine. */
108 if (be->shutdown != NULL) {
109 if ((error = be->shutdown()) != 0) {
110 printf("%s backend shutdown error: %d\n",
116 mtx_lock(&softc->ctl_lock);
117 STAILQ_REMOVE(&softc->be_list, be, ctl_backend_driver, links);
118 softc->num_backends--;
119 mtx_unlock(&softc->ctl_lock);
123 struct ctl_backend_driver *
124 ctl_backend_find(char *backend_name)
126 struct ctl_softc *softc = control_softc;
127 struct ctl_backend_driver *be_tmp;
129 mtx_lock(&softc->ctl_lock);
130 STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
131 if (strcmp(be_tmp->name, backend_name) == 0) {
132 mtx_unlock(&softc->ctl_lock);
136 mtx_unlock(&softc->ctl_lock);