usr.sbin/ctld/ctld.h

   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_LUNS                        1024
  49 #define MAX_NAME_LEN                    223
  50 #define MAX_DATA_SEGMENT_LENGTH         (128 * 1024)
  51 #define MAX_BURST_LENGTH                16776192
  52 #define SOCKBUF_SIZE                    1048576
  53
  54 struct auth {
  55         TAILQ_ENTRY(auth)               a_next;
  56         struct auth_group               *a_auth_group;
  57         char                            *a_user;
  58         char                            *a_secret;
  59         char                            *a_mutual_user;
  60         char                            *a_mutual_secret;
  61 };
  62
  63 struct auth_name {
  64         TAILQ_ENTRY(auth_name)          an_next;
  65         struct auth_group               *an_auth_group;
  66         char                            *an_initator_name;
  67 };
  68
  69 struct auth_portal {
  70         TAILQ_ENTRY(auth_portal)        ap_next;
  71         struct auth_group               *ap_auth_group;
  72         char                            *ap_initator_portal;
  73         struct sockaddr_storage         ap_sa;
  74         int                             ap_mask;
  75 };
  76
  77 #define AG_TYPE_UNKNOWN                 0
  78 #define AG_TYPE_DENY                    1
  79 #define AG_TYPE_NO_AUTHENTICATION       2
  80 #define AG_TYPE_CHAP                    3
  81 #define AG_TYPE_CHAP_MUTUAL             4
  82
  83 struct auth_group {
  84         TAILQ_ENTRY(auth_group)         ag_next;
  85         struct conf                     *ag_conf;
  86         char                            *ag_name;
  87         struct target                   *ag_target;
  88         int                             ag_type;
  89         TAILQ_HEAD(, auth)              ag_auths;
  90         TAILQ_HEAD(, auth_name)         ag_names;
  91         TAILQ_HEAD(, auth_portal)       ag_portals;
  92 };
  93
  94 struct portal {
  95         TAILQ_ENTRY(portal)             p_next;
  96         struct portal_group             *p_portal_group;
  97         bool                            p_iser;
  98         char                            *p_listen;
  99         struct addrinfo                 *p_ai;
 100 #ifdef ICL_KERNEL_PROXY
 101         int                             p_id;
 102 #endif
 103
 104         TAILQ_HEAD(, target)            p_targets;
 105         int                             p_socket;
 106 };
 107
 108 #define PG_FILTER_UNKNOWN               0
 109 #define PG_FILTER_NONE                  1
 110 #define PG_FILTER_PORTAL                2
 111 #define PG_FILTER_PORTAL_NAME           3
 112 #define PG_FILTER_PORTAL_NAME_AUTH      4
 113
 114 struct portal_group {
 115         TAILQ_ENTRY(portal_group)       pg_next;
 116         struct conf                     *pg_conf;
 117         char                            *pg_name;
 118         struct auth_group               *pg_discovery_auth_group;
 119         int                             pg_discovery_filter;
 120         bool                            pg_unassigned;
 121         TAILQ_HEAD(, portal)            pg_portals;
 122         TAILQ_HEAD(, port)              pg_ports;
 123         char                            *pg_redirection;
 124
 125         uint16_t                        pg_tag;
 126 };
 127
 128 struct port {
 129         TAILQ_ENTRY(port)               p_next;
 130         TAILQ_ENTRY(port)               p_pgs;
 131         TAILQ_ENTRY(port)               p_ts;
 132         struct conf                     *p_conf;
 133         char                            *p_name;
 134         struct auth_group               *p_auth_group;
 135         struct portal_group             *p_portal_group;
 136         struct target                   *p_target;
 137
 138         uint32_t                        p_ctl_port;
 139 };
 140
 141 struct lun_option {
 142         TAILQ_ENTRY(lun_option)         lo_next;
 143         struct lun                      *lo_lun;
 144         char                            *lo_name;
 145         char                            *lo_value;
 146 };
 147
 148 struct lun {
 149         TAILQ_ENTRY(lun)                l_next;
 150         struct conf                     *l_conf;
 151         TAILQ_HEAD(, lun_option)        l_options;
 152         char                            *l_name;
 153         char                            *l_backend;
 154         int                             l_blocksize;
 155         char                            *l_device_id;
 156         char                            *l_path;
 157         char                            *l_scsiname;
 158         char                            *l_serial;
 159         int64_t                         l_size;
 160
 161         int                             l_ctl_lun;
 162 };
 163
 164 struct target {
 165         TAILQ_ENTRY(target)             t_next;
 166         struct conf                     *t_conf;
 167         struct lun                      *t_luns[MAX_LUNS];
 168         struct auth_group               *t_auth_group;
 169         TAILQ_HEAD(, port)              t_ports;
 170         char                            *t_name;
 171         char                            *t_alias;
 172         char                            *t_redirection;
 173 };
 174
 175 struct isns {
 176         TAILQ_ENTRY(isns)               i_next;
 177         struct conf                     *i_conf;
 178         char                            *i_addr;
 179         struct addrinfo                 *i_ai;
 180 };
 181
 182 struct conf {
 183         char                            *conf_pidfile_path;
 184         TAILQ_HEAD(, lun)               conf_luns;
 185         TAILQ_HEAD(, target)            conf_targets;
 186         TAILQ_HEAD(, auth_group)        conf_auth_groups;
 187         TAILQ_HEAD(, port)              conf_ports;
 188         TAILQ_HEAD(, portal_group)      conf_portal_groups;
 189         TAILQ_HEAD(, isns)              conf_isns;
 190         int                             conf_isns_period;
 191         int                             conf_isns_timeout;
 192         int                             conf_debug;
 193         int                             conf_timeout;
 194         int                             conf_maxproc;
 195
 196 #ifdef ICL_KERNEL_PROXY
 197         int                             conf_portal_id;
 198 #endif
 199         struct pidfh                    *conf_pidfh;
 200
 201         bool                            conf_default_pg_defined;
 202         bool                            conf_default_ag_defined;
 203         bool                            conf_kernel_port_on;
 204 };
 205
 206 #define CONN_SESSION_TYPE_NONE          0
 207 #define CONN_SESSION_TYPE_DISCOVERY     1
 208 #define CONN_SESSION_TYPE_NORMAL        2
 209
 210 #define CONN_DIGEST_NONE                0
 211 #define CONN_DIGEST_CRC32C              1
 212
 213 struct connection {
 214         struct portal           *conn_portal;
 215         struct port             *conn_port;
 216         struct target           *conn_target;
 217         int                     conn_socket;
 218         int                     conn_session_type;
 219         char                    *conn_initiator_name;
 220         char                    *conn_initiator_addr;
 221         char                    *conn_initiator_alias;
 222         uint8_t                 conn_initiator_isid[6];
 223         struct sockaddr_storage conn_initiator_sa;
 224         uint32_t                conn_cmdsn;
 225         uint32_t                conn_statsn;
 226         size_t                  conn_max_data_segment_length;
 227         size_t                  conn_max_burst_length;
 228         int                     conn_immediate_data;
 229         int                     conn_header_digest;
 230         int                     conn_data_digest;
 231         const char              *conn_user;
 232         struct chap             *conn_chap;
 233 };
 234
 235 struct pdu {
 236         struct connection       *pdu_connection;
 237         struct iscsi_bhs        *pdu_bhs;
 238         char                    *pdu_data;
 239         size_t                  pdu_data_len;
 240 };
 241
 242 #define KEYS_MAX        1024
 243
 244 struct keys {
 245         char            *keys_names[KEYS_MAX];
 246         char            *keys_values[KEYS_MAX];
 247         char            *keys_data;
 248         size_t          keys_data_len;
 249 };
 250
 251 #define CHAP_CHALLENGE_LEN      1024
 252
 253 struct chap {
 254         unsigned char   chap_id;
 255         char            chap_challenge[CHAP_CHALLENGE_LEN];
 256         char            chap_response[MD5_DIGEST_LENGTH];
 257 };
 258
 259 struct rchap {
 260         char            *rchap_secret;
 261         unsigned char   rchap_id;
 262         void            *rchap_challenge;
 263         size_t          rchap_challenge_len;
 264 };
 265
 266 struct chap             *chap_new(void);
 267 char                    *chap_get_id(const struct chap *chap);
 268 char                    *chap_get_challenge(const struct chap *chap);
 269 int                     chap_receive(struct chap *chap, const char *response);
 270 int                     chap_authenticate(struct chap *chap,
 271                             const char *secret);
 272 void                    chap_delete(struct chap *chap);
 273
 274 struct rchap            *rchap_new(const char *secret);
 275 int                     rchap_receive(struct rchap *rchap,
 276                             const char *id, const char *challenge);
 277 char                    *rchap_get_response(struct rchap *rchap);
 278 void                    rchap_delete(struct rchap *rchap);
 279
 280 struct conf             *conf_new(void);
 281 struct conf             *conf_new_from_file(const char *path);
 282 struct conf             *conf_new_from_kernel(void);
 283 void                    conf_delete(struct conf *conf);
 284 int                     conf_verify(struct conf *conf);
 285
 286 struct auth_group       *auth_group_new(struct conf *conf, const char *name);
 287 void                    auth_group_delete(struct auth_group *ag);
 288 struct auth_group       *auth_group_find(const struct conf *conf,
 289                             const char *name);
 290 int                     auth_group_set_type(struct auth_group *ag,
 291                             const char *type);
 292
 293 const struct auth       *auth_new_chap(struct auth_group *ag,
 294                             const char *user, const char *secret);
 295 const struct auth       *auth_new_chap_mutual(struct auth_group *ag,
 296                             const char *user, const char *secret,
 297                             const char *user2, const char *secret2);
 298 const struct auth       *auth_find(const struct auth_group *ag,
 299                             const char *user);
 300
 301 const struct auth_name  *auth_name_new(struct auth_group *ag,
 302                             const char *initiator_name);
 303 bool                    auth_name_defined(const struct auth_group *ag);
 304 const struct auth_name  *auth_name_find(const struct auth_group *ag,
 305                             const char *initiator_name);
 306 int                     auth_name_check(const struct auth_group *ag,
 307                             const char *initiator_name);
 308
 309 const struct auth_portal        *auth_portal_new(struct auth_group *ag,
 310                                     const char *initiator_portal);
 311 bool                    auth_portal_defined(const struct auth_group *ag);
 312 const struct auth_portal        *auth_portal_find(const struct auth_group *ag,
 313                                     const struct sockaddr_storage *sa);
 314 int                             auth_portal_check(const struct auth_group *ag,
 315                                     const struct sockaddr_storage *sa);
 316
 317 struct portal_group     *portal_group_new(struct conf *conf, const char *name);
 318 void                    portal_group_delete(struct portal_group *pg);
 319 struct portal_group     *portal_group_find(const struct conf *conf,
 320                             const char *name);
 321 int                     portal_group_add_listen(struct portal_group *pg,
 322                             const char *listen, bool iser);
 323 int                     portal_group_set_filter(struct portal_group *pg,
 324                             const char *filter);
 325 int                     portal_group_set_redirection(struct portal_group *pg,
 326                             const char *addr);
 327
 328 int                     isns_new(struct conf *conf, const char *addr);
 329 void                    isns_delete(struct isns *is);
 330 void                    isns_register(struct isns *isns, struct isns *oldisns);
 331 void                    isns_check(struct isns *isns);
 332 void                    isns_deregister(struct isns *isns);
 333
 334 struct port             *port_new(struct conf *conf, struct target *target,
 335                             struct portal_group *pg);
 336 struct port             *port_find(const struct conf *conf, const char *name);
 337 struct port             *port_find_in_pg(const struct portal_group *pg,
 338                             const char *target);
 339 void                    port_delete(struct port *port);
 340
 341 struct target           *target_new(struct conf *conf, const char *name);
 342 void                    target_delete(struct target *target);
 343 struct target           *target_find(struct conf *conf,
 344                             const char *name);
 345 int                     target_set_redirection(struct target *target,
 346                             const char *addr);
 347
 348 struct lun              *lun_new(struct conf *conf, const char *name);
 349 void                    lun_delete(struct lun *lun);
 350 struct lun              *lun_find(const struct conf *conf, const char *name);
 351 void                    lun_set_backend(struct lun *lun, const char *value);
 352 void                    lun_set_blocksize(struct lun *lun, size_t value);
 353 void                    lun_set_device_id(struct lun *lun, const char *value);
 354 void                    lun_set_path(struct lun *lun, const char *value);
 355 void                    lun_set_scsiname(struct lun *lun, const char *value);
 356 void                    lun_set_serial(struct lun *lun, const char *value);
 357 void                    lun_set_size(struct lun *lun, size_t value);
 358 void                    lun_set_ctl_lun(struct lun *lun, uint32_t value);
 359
 360 struct lun_option       *lun_option_new(struct lun *lun,
 361                             const char *name, const char *value);
 362 void                    lun_option_delete(struct lun_option *clo);
 363 struct lun_option       *lun_option_find(const struct lun *lun,
 364                             const char *name);
 365 void                    lun_option_set(struct lun_option *clo,
 366                             const char *value);
 367
 368 void                    kernel_init(void);
 369 int                     kernel_lun_add(struct lun *lun);
 370 int                     kernel_lun_resize(struct lun *lun);
 371 int                     kernel_lun_remove(struct lun *lun);
 372 void                    kernel_handoff(struct connection *conn);
 373 int                     kernel_port_add(struct port *port);
 374 int                     kernel_port_update(struct port *port);
 375 int                     kernel_port_remove(struct port *port);
 376 void                    kernel_capsicate(void);
 377
 378 #ifdef ICL_KERNEL_PROXY
 379 void                    kernel_listen(struct addrinfo *ai, bool iser,
 380                             int portal_id);
 381 void                    kernel_accept(int *connection_id, int *portal_id,
 382                             struct sockaddr *client_sa,
 383                             socklen_t *client_salen);
 384 void                    kernel_send(struct pdu *pdu);
 385 void                    kernel_receive(struct pdu *pdu);
 386 #endif
 387
 388 struct keys             *keys_new(void);
 389 void                    keys_delete(struct keys *keys);
 390 void                    keys_load(struct keys *keys, const struct pdu *pdu);
 391 void                    keys_save(struct keys *keys, struct pdu *pdu);
 392 const char              *keys_find(struct keys *keys, const char *name);
 393 int                     keys_find_int(struct keys *keys, const char *name);
 394 void                    keys_add(struct keys *keys,
 395                             const char *name, const char *value);
 396 void                    keys_add_int(struct keys *keys,
 397                             const char *name, int value);
 398
 399 struct pdu              *pdu_new(struct connection *conn);
 400 struct pdu              *pdu_new_response(struct pdu *request);
 401 void                    pdu_delete(struct pdu *pdu);
 402 void                    pdu_receive(struct pdu *request);
 403 void                    pdu_send(struct pdu *response);
 404
 405 void                    login(struct connection *conn);
 406
 407 void                    discovery(struct connection *conn);
 408
 409 void                    log_init(int level);
 410 void                    log_set_peer_name(const char *name);
 411 void                    log_set_peer_addr(const char *addr);
 412 void                    log_err(int, const char *, ...)
 413                             __dead2 __printflike(2, 3);
 414 void                    log_errx(int, const char *, ...)
 415                             __dead2 __printflike(2, 3);
 416 void                    log_warn(const char *, ...) __printflike(1, 2);
 417 void                    log_warnx(const char *, ...) __printflike(1, 2);
 418 void                    log_debugx(const char *, ...) __printflike(1, 2);
 419
 420 char                    *checked_strdup(const char *);
 421 bool                    valid_iscsi_name(const char *name);
 422 void                    set_timeout(int timeout, int fatal);
 423 bool                    timed_out(void);
 424
 425 #endif /* !CTLD_H */