2 * Copyright (c) 2003 Silicon Graphics International Corp.
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30 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend.c#3 $
33 * CTL backend driver registration routines
35 * Author: Ken Merry <ken@FreeBSD.org>
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
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;
86 /* Call the backend's initialization routine. */
87 if (be->init != NULL) {
88 if ((error = be->init()) != 0) {
89 printf("%s backend init error: %d\n",
95 mtx_lock(&softc->ctl_lock);
96 STAILQ_INSERT_TAIL(&softc->be_list, be, links);
97 softc->num_backends++;
98 mtx_unlock(&softc->ctl_lock);
103 ctl_backend_deregister(struct ctl_backend_driver *be)
105 struct ctl_softc *softc = control_softc;
108 /* Call the backend's shutdown routine. */
109 if (be->shutdown != NULL) {
110 if ((error = be->shutdown()) != 0) {
111 printf("%s backend shutdown error: %d\n",
117 mtx_lock(&softc->ctl_lock);
118 STAILQ_REMOVE(&softc->be_list, be, ctl_backend_driver, links);
119 softc->num_backends--;
120 mtx_unlock(&softc->ctl_lock);
124 struct ctl_backend_driver *
125 ctl_backend_find(char *backend_name)
127 struct ctl_softc *softc = control_softc;
128 struct ctl_backend_driver *be_tmp;
130 mtx_lock(&softc->ctl_lock);
131 STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
132 if (strcmp(be_tmp->name, backend_name) == 0) {
133 mtx_unlock(&softc->ctl_lock);
137 mtx_unlock(&softc->ctl_lock);
143 ctl_init_opts(ctl_options_t *opts, int num_args, struct ctl_be_arg *args)
145 struct ctl_option *opt;
149 for (i = 0; i < num_args; i++) {
150 if ((args[i].flags & CTL_BEARG_RD) == 0)
152 if ((args[i].flags & CTL_BEARG_ASCII) == 0)
154 opt = malloc(sizeof(*opt), M_CTL, M_WAITOK);
155 opt->name = strdup(args[i].kname, M_CTL);
156 opt->value = strdup(args[i].kvalue, M_CTL);
157 STAILQ_INSERT_TAIL(opts, opt, links);
162 ctl_update_opts(ctl_options_t *opts, int num_args, struct ctl_be_arg *args)
164 struct ctl_option *opt;
167 for (i = 0; i < num_args; i++) {
168 if ((args[i].flags & CTL_BEARG_RD) == 0)
170 if ((args[i].flags & CTL_BEARG_ASCII) == 0)
172 STAILQ_FOREACH(opt, opts, links) {
173 if (strcmp(opt->name, args[i].kname) == 0)
176 if (args[i].kvalue != NULL &&
177 ((char *)args[i].kvalue)[0] != 0) {
179 free(opt->value, M_CTL);
180 opt->value = strdup(args[i].kvalue, M_CTL);
182 opt = malloc(sizeof(*opt), M_CTL, M_WAITOK);
183 opt->name = strdup(args[i].kname, M_CTL);
184 opt->value = strdup(args[i].kvalue, M_CTL);
185 STAILQ_INSERT_TAIL(opts, opt, links);
188 STAILQ_REMOVE(opts, opt, ctl_option, links);
189 free(opt->name, M_CTL);
190 free(opt->value, M_CTL);
197 ctl_free_opts(ctl_options_t *opts)
199 struct ctl_option *opt;
201 while ((opt = STAILQ_FIRST(opts)) != NULL) {
202 STAILQ_REMOVE_HEAD(opts, links);
203 free(opt->name, M_CTL);
204 free(opt->value, M_CTL);
210 ctl_get_opt(ctl_options_t *opts, const char *name)
212 struct ctl_option *opt;
214 STAILQ_FOREACH(opt, opts, links) {
215 if (strcmp(opt->name, name) == 0) {
223 ctl_get_opt_number(ctl_options_t *opts, const char *name, uint64_t *val)
227 value = ctl_get_opt(opts, name);
230 return (ctl_expand_number(value, val));