2 * Copyright (c) 2003 Silicon Graphics International Corp.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * substantially similar to the "NO WARRANTY" disclaimer below
13 * ("Disclaimer") and any redistribution must be conditioned upon
14 * including a substantially similar Disclaimer requirement for further
15 * binary redistribution.
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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;
69 struct ctl_backend_driver *be_tmp;
71 softc = control_softc;
73 mtx_lock(&softc->ctl_lock);
75 * Sanity check, make sure this isn't a duplicate registration.
77 STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
78 if (strcmp(be_tmp->name, be->name) == 0) {
79 mtx_unlock(&softc->ctl_lock);
83 mtx_unlock(&softc->ctl_lock);
86 * Call the backend's initialization routine.
90 mtx_lock(&softc->ctl_lock);
92 STAILQ_INSERT_TAIL(&softc->be_list, be, links);
94 softc->num_backends++;
97 * Don't want to increment the usage count for internal consumers,
98 * we won't be able to unload otherwise.
100 /* XXX KDM find a substitute for this? */
102 if ((be->flags & CTL_BE_FLAG_INTERNAL) == 0)
106 #ifdef CS_BE_CONFIG_MOVE_DONE_IS_NOT_USED
107 be->config_move_done = ctl_config_move_done;
109 /* XXX KDM fix this! */
112 atomic_set(&be->num_luns, 0);
115 mtx_unlock(&softc->ctl_lock);
121 ctl_backend_deregister(struct ctl_backend_driver *be)
123 struct ctl_softc *softc;
125 softc = control_softc;
127 mtx_lock(&softc->ctl_lock);
130 if (atomic_read(&be->num_luns) != 0) {
132 /* XXX KDM fix this! */
133 if (be->num_luns != 0) {
134 mtx_unlock(&softc->ctl_lock);
138 STAILQ_REMOVE(&softc->be_list, be, ctl_backend_driver, links);
140 softc->num_backends--;
142 /* XXX KDM find a substitute for this? */
144 if ((be->flags & CTL_BE_FLAG_INTERNAL) == 0)
148 mtx_unlock(&softc->ctl_lock);
153 struct ctl_backend_driver *
154 ctl_backend_find(char *backend_name)
156 struct ctl_softc *softc;
157 struct ctl_backend_driver *be_tmp;
159 softc = control_softc;
161 mtx_lock(&softc->ctl_lock);
163 STAILQ_FOREACH(be_tmp, &softc->be_list, links) {
164 if (strcmp(be_tmp->name, backend_name) == 0) {
165 mtx_unlock(&softc->ctl_lock);
170 mtx_unlock(&softc->ctl_lock);
176 ctl_init_opts(ctl_options_t *opts, int num_args, struct ctl_be_arg *args)
178 struct ctl_option *opt;
182 for (i = 0; i < num_args; i++) {
183 if ((args[i].flags & CTL_BEARG_RD) == 0)
185 if ((args[i].flags & CTL_BEARG_ASCII) == 0)
187 opt = malloc(sizeof(*opt), M_CTL, M_WAITOK);
188 opt->name = malloc(strlen(args[i].kname) + 1, M_CTL, M_WAITOK);
189 strcpy(opt->name, args[i].kname);
190 opt->value = malloc(strlen(args[i].kvalue) + 1, M_CTL, M_WAITOK);
191 strcpy(opt->value, args[i].kvalue);
192 STAILQ_INSERT_TAIL(opts, opt, links);
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) {