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
  43 #define DEFAULT_CONFIG_PATH             "/etc/ctl.conf"
  44 #define DEFAULT_PIDFILE                 "/var/run/ctld.pid"
  45 #define DEFAULT_BLOCKSIZE               512
  46 #define DEFAULT_CD_BLOCKSIZE            2048
  47
  48 #define MAX_LUNS                        1024
  49 #define MAX_NAME_LEN                    223
  50 #define MAX_DATA_SEGMENT_LENGTH         (128 * 1024)
  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 TAILQ_HEAD(options, option);
 108
 109 #define PG_FILTER_UNKNOWN               0
 110 #define PG_FILTER_NONE                  1
 111 #define PG_FILTER_PORTAL                2
 112 #define PG_FILTER_PORTAL_NAME           3
 113 #define PG_FILTER_PORTAL_NAME_AUTH      4
 114
 115 struct portal_group {
 116         TAILQ_ENTRY(portal_group)       pg_next;
 117         struct conf                     *pg_conf;
 118         struct options                  pg_options;
 119         char                            *pg_name;
 120         struct auth_group               *pg_discovery_auth_group;
 121         int                             pg_discovery_filter;
 122         int                             pg_foreign;
 123         bool                            pg_unassigned;
 124         TAILQ_HEAD(, portal)            pg_portals;
 125         TAILQ_HEAD(, port)              pg_ports;
 126         char                            *pg_offload;
 127         char                            *pg_redirection;
 128
 129         uint16_t                        pg_tag;
 130 };
 131
 132 struct pport {
 133         TAILQ_ENTRY(pport)              pp_next;
 134         TAILQ_HEAD(, port)              pp_ports;
 135         struct conf                     *pp_conf;
 136         char                            *pp_name;
 137
 138         uint32_t                        pp_ctl_port;
 139 };
 140
 141 struct port {
 142         TAILQ_ENTRY(port)               p_next;
 143         TAILQ_ENTRY(port)               p_pgs;
 144         TAILQ_ENTRY(port)               p_pps;
 145         TAILQ_ENTRY(port)               p_ts;
 146         struct conf                     *p_conf;
 147         char                            *p_name;
 148         struct auth_group               *p_auth_group;
 149         struct portal_group             *p_portal_group;
 150         struct pport                    *p_pport;
 151         struct target                   *p_target;
 152
 153         uint32_t                        p_ctl_port;
 154 };
 155
 156 struct option {
 157         TAILQ_ENTRY(option)             o_next;
 158         char                            *o_name;
 159         char                            *o_value;
 160 };
 161
 162 struct lun {
 163         TAILQ_ENTRY(lun)                l_next;
 164         struct conf                     *l_conf;
 165         struct options                  l_options;
 166         char                            *l_name;
 167         char                            *l_backend;
 168         uint8_t                         l_device_type;
 169         int                             l_blocksize;
 170         char                            *l_device_id;
 171         char                            *l_path;
 172         char                            *l_scsiname;
 173         char                            *l_serial;
 174         int64_t                         l_size;
 175
 176         int                             l_ctl_lun;
 177 };
 178
 179 struct target {
 180         TAILQ_ENTRY(target)             t_next;
 181         struct conf                     *t_conf;
 182         struct lun                      *t_luns[MAX_LUNS];
 183         struct auth_group               *t_auth_group;
 184         TAILQ_HEAD(, port)              t_ports;
 185         char                            *t_name;
 186         char                            *t_alias;
 187         char                            *t_redirection;
 188 };
 189
 190 struct isns {
 191         TAILQ_ENTRY(isns)               i_next;
 192         struct conf                     *i_conf;
 193         char                            *i_addr;
 194         struct addrinfo                 *i_ai;
 195 };
 196
 197 struct conf {
 198         char                            *conf_pidfile_path;
 199         TAILQ_HEAD(, lun)               conf_luns;
 200         TAILQ_HEAD(, target)            conf_targets;
 201         TAILQ_HEAD(, auth_group)        conf_auth_groups;
 202         TAILQ_HEAD(, port)              conf_ports;
 203         TAILQ_HEAD(, portal_group)      conf_portal_groups;
 204         TAILQ_HEAD(, pport)             conf_pports;
 205         TAILQ_HEAD(, isns)              conf_isns;
 206         int                             conf_isns_period;
 207         int                             conf_isns_timeout;
 208         int                             conf_debug;
 209         int                             conf_timeout;
 210         int                             conf_maxproc;
 211
 212 #ifdef ICL_KERNEL_PROXY
 213         int                             conf_portal_id;
 214 #endif
 215         struct pidfh                    *conf_pidfh;
 216
 217         bool                            conf_default_pg_defined;
 218         bool                            conf_default_ag_defined;
 219         bool                            conf_kernel_port_on;
 220 };
 221
 222 #define CONN_SESSION_TYPE_NONE          0
 223 #define CONN_SESSION_TYPE_DISCOVERY     1
 224 #define CONN_SESSION_TYPE_NORMAL        2
 225
 226 #define CONN_DIGEST_NONE                0
 227 #define CONN_DIGEST_CRC32C              1
 228
 229 struct connection {
 230         struct portal           *conn_portal;
 231         struct port             *conn_port;
 232         struct target           *conn_target;
 233         int                     conn_socket;
 234         int                     conn_session_type;
 235         char                    *conn_initiator_name;
 236         char                    *conn_initiator_addr;
 237         char                    *conn_initiator_alias;
 238         uint8_t                 conn_initiator_isid[6];
 239         struct sockaddr_storage conn_initiator_sa;
 240         uint32_t                conn_cmdsn;
 241         uint32_t                conn_statsn;
 242         int                     conn_max_recv_data_segment_limit;
 243         int                     conn_max_send_data_segment_limit;
 244         int                     conn_max_burst_limit;
 245         int                     conn_first_burst_limit;
 246         int                     conn_max_recv_data_segment_length;
 247         int                     conn_max_send_data_segment_length;
 248         int                     conn_max_burst_length;
 249         int                     conn_first_burst_length;
 250         int                     conn_immediate_data;
 251         int                     conn_header_digest;
 252         int                     conn_data_digest;
 253         const char              *conn_user;
 254         struct chap             *conn_chap;
 255 };
 256
 257 struct pdu {
 258         struct connection       *pdu_connection;
 259         struct iscsi_bhs        *pdu_bhs;
 260         char                    *pdu_data;
 261         size_t                  pdu_data_len;
 262 };
 263
 264 #define KEYS_MAX        1024
 265
 266 struct keys {
 267         char            *keys_names[KEYS_MAX];
 268         char            *keys_values[KEYS_MAX];
 269         char            *keys_data;
 270         size_t          keys_data_len;
 271 };
 272
 273 #define CHAP_CHALLENGE_LEN      1024
 274 #define CHAP_DIGEST_LEN         16 /* Equal to MD5 digest size. */
 275
 276 struct chap {
 277         unsigned char   chap_id;
 278         char            chap_challenge[CHAP_CHALLENGE_LEN];
 279         char            chap_response[CHAP_DIGEST_LEN];
 280 };
 281
 282 struct rchap {
 283         char            *rchap_secret;
 284         unsigned char   rchap_id;
 285         void            *rchap_challenge;
 286         size_t          rchap_challenge_len;
 287 };
 288
 289 struct chap             *chap_new(void);
 290 char                    *chap_get_id(const struct chap *chap);
 291 char                    *chap_get_challenge(const struct chap *chap);
 292 int                     chap_receive(struct chap *chap, const char *response);
 293 int                     chap_authenticate(struct chap *chap,
 294                             const char *secret);
 295 void                    chap_delete(struct chap *chap);
 296
 297 struct rchap            *rchap_new(const char *secret);
 298 int                     rchap_receive(struct rchap *rchap,
 299                             const char *id, const char *challenge);
 300 char                    *rchap_get_response(struct rchap *rchap);
 301 void                    rchap_delete(struct rchap *rchap);
 302
 303 int                     parse_conf(struct conf *conf, const char *path);
 304 int                     uclparse_conf(struct conf *conf, const char *path);
 305
 306 struct conf             *conf_new(void);
 307 struct conf             *conf_new_from_kernel(void);
 308 void                    conf_delete(struct conf *conf);
 309 int                     conf_verify(struct conf *conf);
 310
 311 struct auth_group       *auth_group_new(struct conf *conf, const char *name);
 312 void                    auth_group_delete(struct auth_group *ag);
 313 struct auth_group       *auth_group_find(const struct conf *conf,
 314                             const char *name);
 315 int                     auth_group_set_type(struct auth_group *ag,
 316                             const char *type);
 317
 318 const struct auth       *auth_new_chap(struct auth_group *ag,
 319                             const char *user, const char *secret);
 320 const struct auth       *auth_new_chap_mutual(struct auth_group *ag,
 321                             const char *user, const char *secret,
 322                             const char *user2, const char *secret2);
 323 const struct auth       *auth_find(const struct auth_group *ag,
 324                             const char *user);
 325
 326 const struct auth_name  *auth_name_new(struct auth_group *ag,
 327                             const char *initiator_name);
 328 bool                    auth_name_defined(const struct auth_group *ag);
 329 const struct auth_name  *auth_name_find(const struct auth_group *ag,
 330                             const char *initiator_name);
 331 int                     auth_name_check(const struct auth_group *ag,
 332                             const char *initiator_name);
 333
 334 const struct auth_portal        *auth_portal_new(struct auth_group *ag,
 335                                     const char *initiator_portal);
 336 bool                    auth_portal_defined(const struct auth_group *ag);
 337 const struct auth_portal        *auth_portal_find(const struct auth_group *ag,
 338                                     const struct sockaddr_storage *sa);
 339 int                             auth_portal_check(const struct auth_group *ag,
 340                                     const struct sockaddr_storage *sa);
 341
 342 struct portal_group     *portal_group_new(struct conf *conf, const char *name);
 343 void                    portal_group_delete(struct portal_group *pg);
 344 struct portal_group     *portal_group_find(const struct conf *conf,
 345                             const char *name);
 346 int                     portal_group_add_listen(struct portal_group *pg,
 347                             const char *listen, bool iser);
 348 int                     portal_group_set_filter(struct portal_group *pg,
 349                             const char *filter);
 350 int                     portal_group_set_offload(struct portal_group *pg,
 351                             const char *offload);
 352 int                     portal_group_set_redirection(struct portal_group *pg,
 353                             const char *addr);
 354
 355 int                     isns_new(struct conf *conf, const char *addr);
 356 void                    isns_delete(struct isns *is);
 357 void                    isns_register(struct isns *isns, struct isns *oldisns);
 358 void                    isns_check(struct isns *isns);
 359 void                    isns_deregister(struct isns *isns);
 360
 361 struct pport            *pport_new(struct conf *conf, const char *name,
 362                             uint32_t ctl_port);
 363 struct pport            *pport_find(const struct conf *conf, const char *name);
 364 struct pport            *pport_copy(struct pport *pport, struct conf *conf);
 365 void                    pport_delete(struct pport *pport);
 366
 367 struct port             *port_new(struct conf *conf, struct target *target,
 368                             struct portal_group *pg);
 369 struct port             *port_new_pp(struct conf *conf, struct target *target,
 370                             struct pport *pp);
 371 struct port             *port_find(const struct conf *conf, const char *name);
 372 struct port             *port_find_in_pg(const struct portal_group *pg,
 373                             const char *target);
 374 void                    port_delete(struct port *port);
 375 int                     port_is_dummy(struct port *port);
 376
 377 struct target           *target_new(struct conf *conf, const char *name);
 378 void                    target_delete(struct target *target);
 379 struct target           *target_find(struct conf *conf,
 380                             const char *name);
 381 int                     target_set_redirection(struct target *target,
 382                             const char *addr);
 383
 384 struct lun              *lun_new(struct conf *conf, const char *name);
 385 void                    lun_delete(struct lun *lun);
 386 struct lun              *lun_find(const struct conf *conf, const char *name);
 387 void                    lun_set_backend(struct lun *lun, const char *value);
 388 void                    lun_set_device_type(struct lun *lun, uint8_t value);
 389 void                    lun_set_blocksize(struct lun *lun, size_t value);
 390 void                    lun_set_device_id(struct lun *lun, const char *value);
 391 void                    lun_set_path(struct lun *lun, const char *value);
 392 void                    lun_set_scsiname(struct lun *lun, const char *value);
 393 void                    lun_set_serial(struct lun *lun, const char *value);
 394 void                    lun_set_size(struct lun *lun, size_t value);
 395 void                    lun_set_ctl_lun(struct lun *lun, uint32_t value);
 396
 397 struct option           *option_new(struct options *os,
 398                             const char *name, const char *value);
 399 void                    option_delete(struct options *os, struct option *co);
 400 struct option           *option_find(const struct options *os, const char *name);
 401 void                    option_set(struct option *o, const char *value);
 402
 403 void                    kernel_init(void);
 404 int                     kernel_lun_add(struct lun *lun);
 405 int                     kernel_lun_modify(struct lun *lun);
 406 int                     kernel_lun_remove(struct lun *lun);
 407 void                    kernel_handoff(struct connection *conn);
 408 void                    kernel_limits(const char *offload,
 409                             int *max_recv_data_segment_length,
 410                             int *max_send_data_segment_length,
 411                             int *max_burst_length,
 412                             int *first_burst_length);
 413 int                     kernel_port_add(struct port *port);
 414 int                     kernel_port_update(struct port *port, struct port *old);
 415 int                     kernel_port_remove(struct port *port);
 416 void                    kernel_capsicate(void);
 417
 418 #ifdef ICL_KERNEL_PROXY
 419 void                    kernel_listen(struct addrinfo *ai, bool iser,
 420                             int portal_id);
 421 void                    kernel_accept(int *connection_id, int *portal_id,
 422                             struct sockaddr *client_sa,
 423                             socklen_t *client_salen);
 424 void                    kernel_send(struct pdu *pdu);
 425 void                    kernel_receive(struct pdu *pdu);
 426 #endif
 427
 428 struct keys             *keys_new(void);
 429 void                    keys_delete(struct keys *keys);
 430 void                    keys_load(struct keys *keys, const struct pdu *pdu);
 431 void                    keys_save(struct keys *keys, struct pdu *pdu);
 432 const char              *keys_find(struct keys *keys, const char *name);
 433 void                    keys_add(struct keys *keys,
 434                             const char *name, const char *value);
 435 void                    keys_add_int(struct keys *keys,
 436                             const char *name, int value);
 437
 438 struct pdu              *pdu_new(struct connection *conn);
 439 struct pdu              *pdu_new_response(struct pdu *request);
 440 void                    pdu_delete(struct pdu *pdu);
 441 void                    pdu_receive(struct pdu *request);
 442 void                    pdu_send(struct pdu *response);
 443
 444 void                    login(struct connection *conn);
 445
 446 void                    discovery(struct connection *conn);
 447
 448 void                    log_init(int level);
 449 void                    log_set_peer_name(const char *name);
 450 void                    log_set_peer_addr(const char *addr);
 451 void                    log_err(int, const char *, ...)
 452                             __dead2 __printflike(2, 3);
 453 void                    log_errx(int, const char *, ...)
 454                             __dead2 __printflike(2, 3);
 455 void                    log_warn(const char *, ...) __printflike(1, 2);
 456 void                    log_warnx(const char *, ...) __printflike(1, 2);
 457 void                    log_debugx(const char *, ...) __printflike(1, 2);
 458
 459 char                    *checked_strdup(const char *);
 460 bool                    valid_iscsi_name(const char *name);
 461 void                    set_timeout(int timeout, int fatal);
 462 bool                    timed_out(void);
 463
 464 #endif /* !CTLD_H */