1/*- 2 * Copyright (c) 2003 Silicon Graphics International Corp. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 22 unchanged lines hidden (view full) --- 31 */ 32/* 33 * CTL backend driver registration routines 34 * 35 * Author: Ken Merry <ken@FreeBSD.org> 36 */ 37 38#include <sys/cdefs.h> |
39__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_backend.c 275942 2014-12-19 20:35:06Z mav $"); |
40 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> 46#include <sys/lock.h> 47#include <sys/mutex.h> --- 13 unchanged lines hidden (view full) --- 61#include <cam/ctl/ctl_private.h> 62#include <cam/ctl/ctl_debug.h> 63 64extern struct ctl_softc *control_softc; 65 66int 67ctl_backend_register(struct ctl_backend_driver *be) 68{ |
69 struct ctl_softc *softc; |
70 struct ctl_backend_driver *be_tmp; 71 |
72 softc = control_softc; |
73 |
74 mtx_lock(&softc->ctl_lock); |
75 /* 76 * Sanity check, make sure this isn't a duplicate registration. 77 */ |
78 STAILQ_FOREACH(be_tmp, &softc->be_list, links) { |
79 if (strcmp(be_tmp->name, be->name) == 0) { |
80 mtx_unlock(&softc->ctl_lock); |
81 return (-1); 82 } 83 } |
84 mtx_unlock(&softc->ctl_lock); |
85 86 /* 87 * Call the backend's initialization routine. 88 */ 89 be->init(); 90 |
91 mtx_lock(&softc->ctl_lock); |
92 |
93 STAILQ_INSERT_TAIL(&softc->be_list, be, links); |
94 |
95 softc->num_backends++; |
96 97 /* 98 * Don't want to increment the usage count for internal consumers, 99 * we won't be able to unload otherwise. 100 */ 101 /* XXX KDM find a substitute for this? */ 102#if 0 103 if ((be->flags & CTL_BE_FLAG_INTERNAL) == 0) --- 4 unchanged lines hidden (view full) --- 108 be->config_move_done = ctl_config_move_done; 109#endif 110 /* XXX KDM fix this! */ 111 be->num_luns = 0; 112#if 0 113 atomic_set(&be->num_luns, 0); 114#endif 115 |
116 mtx_unlock(&softc->ctl_lock); |
117 118 return (0); 119} 120 121int 122ctl_backend_deregister(struct ctl_backend_driver *be) 123{ |
124 struct ctl_softc *softc; |
125 |
126 softc = control_softc; |
127 |
128 mtx_lock(&softc->ctl_lock); |
129 130#if 0 131 if (atomic_read(&be->num_luns) != 0) { 132#endif 133 /* XXX KDM fix this! */ 134 if (be->num_luns != 0) { |
135 mtx_unlock(&softc->ctl_lock); |
136 return (-1); 137 } 138 |
139 STAILQ_REMOVE(&softc->be_list, be, ctl_backend_driver, links); |
140 |
141 softc->num_backends--; |
142 143 /* XXX KDM find a substitute for this? */ 144#if 0 145 if ((be->flags & CTL_BE_FLAG_INTERNAL) == 0) 146 MOD_DEC_USE_COUNT; 147#endif 148 |
149 mtx_unlock(&softc->ctl_lock); |
150 151 return (0); 152} 153 154struct ctl_backend_driver * 155ctl_backend_find(char *backend_name) 156{ |
157 struct ctl_softc *softc; |
158 struct ctl_backend_driver *be_tmp; 159 |
160 softc = control_softc; |
161 |
162 mtx_lock(&softc->ctl_lock); |
163 |
164 STAILQ_FOREACH(be_tmp, &softc->be_list, links) { |
165 if (strcmp(be_tmp->name, backend_name) == 0) { |
166 mtx_unlock(&softc->ctl_lock); |
167 return (be_tmp); 168 } 169 } 170 |
171 mtx_unlock(&softc->ctl_lock); |
172 173 return (NULL); 174} 175 176void 177ctl_init_opts(ctl_options_t *opts, int num_args, struct ctl_be_arg *args) 178{ 179 struct ctl_option *opt; --- 42 unchanged lines hidden --- |