1 /*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef CTLD_H 33 #define CTLD_H 34 35 #include <sys/queue.h> 36 #ifdef ICL_KERNEL_PROXY 37 #include <sys/types.h> 38 #endif 39 #include <sys/socket.h> 40 #include <stdbool.h> 41 #include <libutil.h> 42 #include <openssl/md5.h> 43 44 #define DEFAULT_CONFIG_PATH "/etc/ctl.conf" 45 #define DEFAULT_PIDFILE "/var/run/ctld.pid" 46 #define DEFAULT_BLOCKSIZE 512 47 48 #define MAX_NAME_LEN 223 49 #define MAX_DATA_SEGMENT_LENGTH (128 * 1024) 50 #define MAX_BURST_LENGTH 16776192 51 #define SOCKBUF_SIZE 1048576 52 53 struct auth { 54 TAILQ_ENTRY(auth) a_next; 55 struct auth_group *a_auth_group; 56 char *a_user; 57 char *a_secret; 58 char *a_mutual_user; 59 char *a_mutual_secret; 60 }; 61 62 struct auth_name { 63 TAILQ_ENTRY(auth_name) an_next; 64 struct auth_group *an_auth_group; 65 char *an_initator_name; 66 }; 67 68 struct auth_portal { 69 TAILQ_ENTRY(auth_portal) ap_next; 70 struct auth_group *ap_auth_group; 71 char *ap_initator_portal; 72 struct sockaddr_storage ap_sa; 73 int ap_mask; 74 }; 75 76 #define AG_TYPE_UNKNOWN 0 77 #define AG_TYPE_DENY 1 78 #define AG_TYPE_NO_AUTHENTICATION 2 79 #define AG_TYPE_CHAP 3 80 #define AG_TYPE_CHAP_MUTUAL 4 81 82 struct auth_group { 83 TAILQ_ENTRY(auth_group) ag_next; 84 struct conf *ag_conf; 85 char *ag_name; 86 struct target *ag_target; 87 int ag_type; 88 TAILQ_HEAD(, auth) ag_auths; 89 TAILQ_HEAD(, auth_name) ag_names; 90 TAILQ_HEAD(, auth_portal) ag_portals; 91 }; 92 93 struct portal { 94 TAILQ_ENTRY(portal) p_next; 95 struct portal_group *p_portal_group; 96 bool p_iser; 97 char *p_listen; 98 struct addrinfo *p_ai; 99 #ifdef ICL_KERNEL_PROXY 100 int p_id; 101 #endif 102 103 TAILQ_HEAD(, target) p_targets; 104 int p_socket; 105 }; 106 107 #define PG_FILTER_UNKNOWN 0 108 #define PG_FILTER_NONE 1 109 #define PG_FILTER_PORTAL 2 110 #define PG_FILTER_PORTAL_NAME 3 111 #define PG_FILTER_PORTAL_NAME_AUTH 4 112 113 struct portal_group { 114 TAILQ_ENTRY(portal_group) pg_next; 115 struct conf *pg_conf; 116 char *pg_name; 117 struct auth_group *pg_discovery_auth_group; 118 int pg_discovery_filter; 119 bool pg_unassigned; 120 TAILQ_HEAD(, portal) pg_portals; 121 char *pg_redirection; 122 123 uint16_t pg_tag; 124 }; 125 126 struct lun_option { 127 TAILQ_ENTRY(lun_option) lo_next; 128 struct lun *lo_lun; 129 char *lo_name; 130 char *lo_value; 131 }; 132 133 struct lun { 134 TAILQ_ENTRY(lun) l_next; 135 TAILQ_HEAD(, lun_option) l_options; 136 struct target *l_target; 137 int l_lun; 138 char *l_backend; 139 int l_blocksize; 140 char *l_device_id; 141 char *l_path; 142 char *l_serial; 143 int64_t l_size; 144 145 int l_ctl_lun; 146 }; 147 148 struct target { 149 TAILQ_ENTRY(target) t_next; 150 TAILQ_HEAD(, lun) t_luns; 151 struct conf *t_conf; 152 struct auth_group *t_auth_group; 153 struct portal_group *t_portal_group; 154 char *t_name; 155 char *t_alias; 156 char *t_redirection; 157 }; 158 159 struct isns { 160 TAILQ_ENTRY(isns) i_next; 161 struct conf *i_conf; 162 char *i_addr; 163 struct addrinfo *i_ai; 164 }; 165 166 struct conf { 167 char *conf_pidfile_path; 168 TAILQ_HEAD(, target) conf_targets; 169 TAILQ_HEAD(, auth_group) conf_auth_groups; 170 TAILQ_HEAD(, portal_group) conf_portal_groups; 171 TAILQ_HEAD(, isns) conf_isns; 172 int conf_isns_period; 173 int conf_isns_timeout; 174 int conf_debug; 175 int conf_timeout; 176 int conf_maxproc; 177 178 uint16_t conf_last_portal_group_tag; 179 #ifdef ICL_KERNEL_PROXY 180 int conf_portal_id; 181 #endif 182 struct pidfh *conf_pidfh; 183 184 bool conf_default_pg_defined; 185 bool conf_default_ag_defined; 186 bool conf_kernel_port_on; 187 }; 188 189 #define CONN_SESSION_TYPE_NONE 0 190 #define CONN_SESSION_TYPE_DISCOVERY 1 191 #define CONN_SESSION_TYPE_NORMAL 2 192 193 #define CONN_DIGEST_NONE 0 194 #define CONN_DIGEST_CRC32C 1 195 196 struct connection { 197 struct portal *conn_portal; 198 struct target *conn_target; 199 int conn_socket; 200 int conn_session_type; 201 char *conn_initiator_name; 202 char *conn_initiator_addr; 203 char *conn_initiator_alias; 204 uint8_t conn_initiator_isid[6]; 205 struct sockaddr_storage conn_initiator_sa; 206 uint32_t conn_cmdsn; 207 uint32_t conn_statsn; 208 size_t conn_max_data_segment_length; 209 size_t conn_max_burst_length; 210 int conn_immediate_data; 211 int conn_header_digest; 212 int conn_data_digest; 213 const char *conn_user; 214 struct chap *conn_chap; 215 }; 216 217 struct pdu { 218 struct connection *pdu_connection; 219 struct iscsi_bhs *pdu_bhs; 220 char *pdu_data; 221 size_t pdu_data_len; 222 }; 223 224 #define KEYS_MAX 1024 225 226 struct keys { 227 char *keys_names[KEYS_MAX]; 228 char *keys_values[KEYS_MAX]; 229 char *keys_data; 230 size_t keys_data_len; 231 }; 232 233 #define CHAP_CHALLENGE_LEN 1024 234 235 struct chap { 236 unsigned char chap_id; 237 char chap_challenge[CHAP_CHALLENGE_LEN]; 238 char chap_response[MD5_DIGEST_LENGTH]; 239 }; 240 241 struct rchap { 242 char *rchap_secret; 243 unsigned char rchap_id; 244 void *rchap_challenge; 245 size_t rchap_challenge_len; 246 }; 247 248 struct chap *chap_new(void); 249 char *chap_get_id(const struct chap *chap); 250 char *chap_get_challenge(const struct chap *chap); 251 int chap_receive(struct chap *chap, const char *response); 252 int chap_authenticate(struct chap *chap, 253 const char *secret); 254 void chap_delete(struct chap *chap); 255 256 struct rchap *rchap_new(const char *secret); 257 int rchap_receive(struct rchap *rchap, 258 const char *id, const char *challenge); 259 char *rchap_get_response(struct rchap *rchap); 260 void rchap_delete(struct rchap *rchap); 261 262 struct conf *conf_new(void); 263 struct conf *conf_new_from_file(const char *path); 264 struct conf *conf_new_from_kernel(void); 265 void conf_delete(struct conf *conf); 266 int conf_verify(struct conf *conf); 267 268 struct auth_group *auth_group_new(struct conf *conf, const char *name); 269 void auth_group_delete(struct auth_group *ag); 270 struct auth_group *auth_group_find(const struct conf *conf, 271 const char *name); 272 int auth_group_set_type(struct auth_group *ag, 273 const char *type); 274 275 const struct auth *auth_new_chap(struct auth_group *ag, 276 const char *user, const char *secret); 277 const struct auth *auth_new_chap_mutual(struct auth_group *ag, 278 const char *user, const char *secret, 279 const char *user2, const char *secret2); 280 const struct auth *auth_find(const struct auth_group *ag, 281 const char *user); 282 283 const struct auth_name *auth_name_new(struct auth_group *ag, 284 const char *initiator_name); 285 bool auth_name_defined(const struct auth_group *ag); 286 const struct auth_name *auth_name_find(const struct auth_group *ag, 287 const char *initiator_name); 288 int auth_name_check(const struct auth_group *ag, 289 const char *initiator_name); 290 291 const struct auth_portal *auth_portal_new(struct auth_group *ag, 292 const char *initiator_portal); 293 bool auth_portal_defined(const struct auth_group *ag); 294 const struct auth_portal *auth_portal_find(const struct auth_group *ag, 295 const struct sockaddr_storage *sa); 296 int auth_portal_check(const struct auth_group *ag, 297 const struct sockaddr_storage *sa); 298 299 struct portal_group *portal_group_new(struct conf *conf, const char *name); 300 void portal_group_delete(struct portal_group *pg); 301 struct portal_group *portal_group_find(const struct conf *conf, 302 const char *name); 303 int portal_group_add_listen(struct portal_group *pg, 304 const char *listen, bool iser); 305 int portal_group_set_filter(struct portal_group *pg, 306 const char *filter); 307 int portal_group_set_redirection(struct portal_group *pg, 308 const char *addr); 309 310 int isns_new(struct conf *conf, const char *addr); 311 void isns_delete(struct isns *is); 312 void isns_register(struct isns *isns, struct isns *oldisns); 313 void isns_check(struct isns *isns); 314 void isns_deregister(struct isns *isns); 315 316 struct target *target_new(struct conf *conf, const char *name); 317 void target_delete(struct target *target); 318 struct target *target_find(struct conf *conf, 319 const char *name); 320 int target_set_redirection(struct target *target, 321 const char *addr); 322 323 struct lun *lun_new(struct target *target, int lun_id); 324 void lun_delete(struct lun *lun); 325 struct lun *lun_find(const struct target *target, int lun_id); 326 void lun_set_backend(struct lun *lun, const char *value); 327 void lun_set_blocksize(struct lun *lun, size_t value); 328 void lun_set_device_id(struct lun *lun, const char *value); 329 void lun_set_path(struct lun *lun, const char *value); 330 void lun_set_serial(struct lun *lun, const char *value); 331 void lun_set_size(struct lun *lun, size_t value); 332 void lun_set_ctl_lun(struct lun *lun, uint32_t value); 333 334 struct lun_option *lun_option_new(struct lun *lun, 335 const char *name, const char *value); 336 void lun_option_delete(struct lun_option *clo); 337 struct lun_option *lun_option_find(const struct lun *lun, 338 const char *name); 339 void lun_option_set(struct lun_option *clo, 340 const char *value); 341 342 void kernel_init(void); 343 int kernel_lun_add(struct lun *lun); 344 int kernel_lun_resize(struct lun *lun); 345 int kernel_lun_remove(struct lun *lun); 346 void kernel_handoff(struct connection *conn); 347 int kernel_port_add(struct target *targ); 348 int kernel_port_remove(struct target *targ); 349 void kernel_capsicate(void); 350 351 #ifdef ICL_KERNEL_PROXY 352 void kernel_listen(struct addrinfo *ai, bool iser, 353 int portal_id); 354 void kernel_accept(int *connection_id, int *portal_id, 355 struct sockaddr *client_sa, 356 socklen_t *client_salen); 357 void kernel_send(struct pdu *pdu); 358 void kernel_receive(struct pdu *pdu); 359 #endif 360 361 struct keys *keys_new(void); 362 void keys_delete(struct keys *keys); 363 void keys_load(struct keys *keys, const struct pdu *pdu); 364 void keys_save(struct keys *keys, struct pdu *pdu); 365 const char *keys_find(struct keys *keys, const char *name); 366 int keys_find_int(struct keys *keys, const char *name); 367 void keys_add(struct keys *keys, 368 const char *name, const char *value); 369 void keys_add_int(struct keys *keys, 370 const char *name, int value); 371 372 struct pdu *pdu_new(struct connection *conn); 373 struct pdu *pdu_new_response(struct pdu *request); 374 void pdu_delete(struct pdu *pdu); 375 void pdu_receive(struct pdu *request); 376 void pdu_send(struct pdu *response); 377 378 void login(struct connection *conn); 379 380 void discovery(struct connection *conn); 381 382 void log_init(int level); 383 void log_set_peer_name(const char *name); 384 void log_set_peer_addr(const char *addr); 385 void log_err(int, const char *, ...) 386 __dead2 __printflike(2, 3); 387 void log_errx(int, const char *, ...) 388 __dead2 __printflike(2, 3); 389 void log_warn(const char *, ...) __printflike(1, 2); 390 void log_warnx(const char *, ...) __printflike(1, 2); 391 void log_debugx(const char *, ...) __printflike(1, 2); 392 393 char *checked_strdup(const char *); 394 bool valid_iscsi_name(const char *name); 395 void set_timeout(int timeout, int fatal); 396 bool timed_out(void); 397 398 #endif /* !CTLD_H */ 399