usr.sbin/ctld/ctld.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2012 The FreeBSD Foundation
   5  * All rights reserved.
   6  *
   7  * This software was developed by Edward Tomasz Napierala under sponsorship
   8  * from the FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD$
  32  */
  33
  34 #ifndef CTLD_H
  35 #define CTLD_H
  36
  37 #include <sys/queue.h>
  38 #ifdef ICL_KERNEL_PROXY
  39 #include <sys/types.h>
  40 #endif
  41 #include <sys/socket.h>
  42 #include <stdbool.h>
  43 #include <libutil.h>
  44
  45 #define DEFAULT_CONFIG_PATH             "/etc/ctl.conf"
  46 #define DEFAULT_PIDFILE                 "/var/run/ctld.pid"
  47 #define DEFAULT_BLOCKSIZE               512
  48 #define DEFAULT_CD_BLOCKSIZE            2048
  49
  50 #define MAX_LUNS                        1024
  51 #define MAX_NAME_LEN                    223
  52 #define MAX_DATA_SEGMENT_LENGTH         (128 * 1024)
  53 #define SOCKBUF_SIZE                    1048576
  54
  55 struct auth {
  56         TAILQ_ENTRY(auth)               a_next;
  57         struct auth_group               *a_auth_group;
  58         char                            *a_user;
  59         char                            *a_secret;
  60         char                            *a_mutual_user;
  61         char                            *a_mutual_secret;
  62 };
  63
  64 struct auth_name {
  65         TAILQ_ENTRY(auth_name)          an_next;
  66         struct auth_group               *an_auth_group;
  67         char                            *an_initator_name;
  68 };
  69
  70 struct auth_portal {
  71         TAILQ_ENTRY(auth_portal)        ap_next;
  72         struct auth_group               *ap_auth_group;
  73         char                            *ap_initator_portal;
  74         struct sockaddr_storage         ap_sa;
  75         int                             ap_mask;
  76 };
  77
  78 #define AG_TYPE_UNKNOWN                 0
  79 #define AG_TYPE_DENY                    1
  80 #define AG_TYPE_NO_AUTHENTICATION       2
  81 #define AG_TYPE_CHAP                    3
  82 #define AG_TYPE_CHAP_MUTUAL             4
  83
  84 struct auth_group {
  85         TAILQ_ENTRY(auth_group)         ag_next;
  86         struct conf                     *ag_conf;
  87         char                            *ag_name;
  88         struct target                   *ag_target;
  89         int                             ag_type;
  90         TAILQ_HEAD(, auth)              ag_auths;
  91         TAILQ_HEAD(, auth_name)         ag_names;
  92         TAILQ_HEAD(, auth_portal)       ag_portals;
  93 };
  94
  95 struct portal {
  96         TAILQ_ENTRY(portal)             p_next;
  97         struct portal_group             *p_portal_group;
  98         bool                            p_iser;
  99         char                            *p_listen;
 100         struct addrinfo                 *p_ai;
 101 #ifdef ICL_KERNEL_PROXY
 102         int                             p_id;
 103 #endif
 104
 105         TAILQ_HEAD(, target)            p_targets;
 106         int                             p_socket;
 107 };
 108
 109 TAILQ_HEAD(options, option);
 110
 111 #define PG_FILTER_UNKNOWN               0
 112 #define PG_FILTER_NONE                  1
 113 #define PG_FILTER_PORTAL                2
 114 #define PG_FILTER_PORTAL_NAME           3
 115 #define PG_FILTER_PORTAL_NAME_AUTH      4
 116
 117 struct portal_group {
 118         TAILQ_ENTRY(portal_group)       pg_next;
 119         struct conf                     *pg_conf;
 120         struct options                  pg_options;
 121         char                            *pg_name;
 122         struct auth_group               *pg_discovery_auth_group;
 123         int                             pg_discovery_filter;
 124         int                             pg_foreign;
 125         bool                            pg_unassigned;
 126         TAILQ_HEAD(, portal)            pg_portals;
 127         TAILQ_HEAD(, port)              pg_ports;
 128         char                            *pg_offload;
 129         char                            *pg_redirection;
 130         int                             pg_dscp;
 131         int                             pg_pcp;
 132
 133         uint16_t                        pg_tag;
 134 };
 135
 136 struct pport {
 137         TAILQ_ENTRY(pport)              pp_next;
 138         TAILQ_HEAD(, port)              pp_ports;
 139         struct conf                     *pp_conf;
 140         char                            *pp_name;
 141
 142         uint32_t                        pp_ctl_port;
 143 };
 144
 145 struct port {
 146         TAILQ_ENTRY(port)               p_next;
 147         TAILQ_ENTRY(port)               p_pgs;
 148         TAILQ_ENTRY(port)               p_pps;
 149         TAILQ_ENTRY(port)               p_ts;
 150         struct conf                     *p_conf;
 151         char                            *p_name;
 152         struct auth_group               *p_auth_group;
 153         struct portal_group             *p_portal_group;
 154         struct pport                    *p_pport;
 155         struct target                   *p_target;
 156
 157         int                             p_ioctl_port;
 158         int                             p_ioctl_pp;
 159         int                             p_ioctl_vp;
 160         uint32_t                        p_ctl_port;
 161 };
 162
 163 struct option {
 164         TAILQ_ENTRY(option)             o_next;
 165         char                            *o_name;
 166         char                            *o_value;
 167 };
 168
 169 struct lun {
 170         TAILQ_ENTRY(lun)                l_next;
 171         struct conf                     *l_conf;
 172         struct options                  l_options;
 173         char                            *l_name;
 174         char                            *l_backend;
 175         uint8_t                         l_device_type;
 176         int                             l_blocksize;
 177         char                            *l_device_id;
 178         char                            *l_path;
 179         char                            *l_scsiname;
 180         char                            *l_serial;
 181         int64_t                         l_size;
 182
 183         int                             l_ctl_lun;
 184 };
 185
 186 struct target {
 187         TAILQ_ENTRY(target)             t_next;
 188         struct conf                     *t_conf;
 189         struct lun                      *t_luns[MAX_LUNS];
 190         struct auth_group               *t_auth_group;
 191         TAILQ_HEAD(, port)              t_ports;
 192         char                            *t_name;
 193         char                            *t_alias;
 194         char                            *t_redirection;
 195 };
 196
 197 struct isns {
 198         TAILQ_ENTRY(isns)               i_next;
 199         struct conf                     *i_conf;
 200         char                            *i_addr;
 201         struct addrinfo                 *i_ai;
 202 };
 203
 204 struct conf {
 205         char                            *conf_pidfile_path;
 206         TAILQ_HEAD(, lun)               conf_luns;
 207         TAILQ_HEAD(, target)            conf_targets;
 208         TAILQ_HEAD(, auth_group)        conf_auth_groups;
 209         TAILQ_HEAD(, port)              conf_ports;
 210         TAILQ_HEAD(, portal_group)      conf_portal_groups;
 211         TAILQ_HEAD(, pport)             conf_pports;
 212         TAILQ_HEAD(, isns)              conf_isns;
 213         int                             conf_isns_period;
 214         int                             conf_isns_timeout;
 215         int                             conf_debug;
 216         int                             conf_timeout;
 217         int                             conf_maxproc;
 218
 219 #ifdef ICL_KERNEL_PROXY
 220         int                             conf_portal_id;
 221 #endif
 222         struct pidfh                    *conf_pidfh;
 223
 224         bool                            conf_default_pg_defined;
 225         bool                            conf_default_ag_defined;
 226         bool                            conf_kernel_port_on;
 227 };
 228
 229 #define CONN_SESSION_TYPE_NONE          0
 230 #define CONN_SESSION_TYPE_DISCOVERY     1
 231 #define CONN_SESSION_TYPE_NORMAL        2
 232
 233 #define CONN_DIGEST_NONE                0
 234 #define CONN_DIGEST_CRC32C              1
 235
 236 struct connection {
 237         struct portal           *conn_portal;
 238         struct port             *conn_port;
 239         struct target           *conn_target;
 240         int                     conn_socket;
 241         int                     conn_session_type;
 242         char                    *conn_initiator_name;
 243         char                    *conn_initiator_addr;
 244         char                    *conn_initiator_alias;
 245         uint8_t                 conn_initiator_isid[6];
 246         struct sockaddr_storage conn_initiator_sa;
 247         uint32_t                conn_cmdsn;
 248         uint32_t                conn_statsn;
 249         int                     conn_max_recv_data_segment_limit;
 250         int                     conn_max_send_data_segment_limit;
 251         int                     conn_max_burst_limit;
 252         int                     conn_first_burst_limit;
 253         int                     conn_max_recv_data_segment_length;
 254         int                     conn_max_send_data_segment_length;
 255         int                     conn_max_burst_length;
 256         int                     conn_first_burst_length;
 257         int                     conn_immediate_data;
 258         int                     conn_header_digest;
 259         int                     conn_data_digest;
 260         const char              *conn_user;
 261         struct chap             *conn_chap;
 262 };
 263
 264 struct pdu {
 265         struct connection       *pdu_connection;
 266         struct iscsi_bhs        *pdu_bhs;
 267         char                    *pdu_data;
 268         size_t                  pdu_data_len;
 269 };
 270
 271 #define KEYS_MAX        1024
 272
 273 struct keys {
 274         char            *keys_names[KEYS_MAX];
 275         char            *keys_values[KEYS_MAX];
 276         char            *keys_data;
 277         size_t          keys_data_len;
 278 };
 279
 280 #define CHAP_CHALLENGE_LEN      1024
 281 #define CHAP_DIGEST_LEN         16 /* Equal to MD5 digest size. */
 282
 283 struct chap {
 284         unsigned char   chap_id;
 285         char            chap_challenge[CHAP_CHALLENGE_LEN];
 286         char            chap_response[CHAP_DIGEST_LEN];
 287 };
 288
 289 struct rchap {
 290         char            *rchap_secret;
 291         unsigned char   rchap_id;
 292         void            *rchap_challenge;
 293         size_t          rchap_challenge_len;
 294 };
 295
 296 struct chap             *chap_new(void);
 297 char                    *chap_get_id(const struct chap *chap);
 298 char                    *chap_get_challenge(const struct chap *chap);
 299 int                     chap_receive(struct chap *chap, const char *response);
 300 int                     chap_authenticate(struct chap *chap,
 301                             const char *secret);
 302 void                    chap_delete(struct chap *chap);
 303
 304 struct rchap            *rchap_new(const char *secret);
 305 int                     rchap_receive(struct rchap *rchap,
 306                             const char *id, const char *challenge);
 307 char                    *rchap_get_response(struct rchap *rchap);
 308 void                    rchap_delete(struct rchap *rchap);
 309
 310 int                     parse_conf(struct conf *conf, const char *path);
 311 int                     uclparse_conf(struct conf *conf, const char *path);
 312
 313 struct conf             *conf_new(void);
 314 struct conf             *conf_new_from_kernel(void);
 315 void                    conf_delete(struct conf *conf);
 316 int                     conf_verify(struct conf *conf);
 317
 318 struct auth_group       *auth_group_new(struct conf *conf, const char *name);
 319 void                    auth_group_delete(struct auth_group *ag);
 320 struct auth_group       *auth_group_find(const struct conf *conf,
 321                             const char *name);
 322 int                     auth_group_set_type(struct auth_group *ag,
 323                             const char *type);
 324
 325 const struct auth       *auth_new_chap(struct auth_group *ag,
 326                             const char *user, const char *secret);
 327 const struct auth       *auth_new_chap_mutual(struct auth_group *ag,
 328                             const char *user, const char *secret,
 329                             const char *user2, const char *secret2);
 330 const struct auth       *auth_find(const struct auth_group *ag,
 331                             const char *user);
 332
 333 const struct auth_name  *auth_name_new(struct auth_group *ag,
 334                             const char *initiator_name);
 335 bool                    auth_name_defined(const struct auth_group *ag);
 336 const struct auth_name  *auth_name_find(const struct auth_group *ag,
 337                             const char *initiator_name);
 338 int                     auth_name_check(const struct auth_group *ag,
 339                             const char *initiator_name);
 340
 341 const struct auth_portal        *auth_portal_new(struct auth_group *ag,
 342                                     const char *initiator_portal);
 343 bool                    auth_portal_defined(const struct auth_group *ag);
 344 const struct auth_portal        *auth_portal_find(const struct auth_group *ag,
 345                                     const struct sockaddr_storage *sa);
 346 int                             auth_portal_check(const struct auth_group *ag,
 347                                     const struct sockaddr_storage *sa);
 348
 349 struct portal_group     *portal_group_new(struct conf *conf, const char *name);
 350 void                    portal_group_delete(struct portal_group *pg);
 351 struct portal_group     *portal_group_find(const struct conf *conf,
 352                             const char *name);
 353 int                     portal_group_add_listen(struct portal_group *pg,
 354                             const char *listen, bool iser);
 355 int                     portal_group_set_filter(struct portal_group *pg,
 356                             const char *filter);
 357 int                     portal_group_set_offload(struct portal_group *pg,
 358                             const char *offload);
 359 int                     portal_group_set_redirection(struct portal_group *pg,
 360                             const char *addr);
 361
 362 int                     isns_new(struct conf *conf, const char *addr);
 363 void                    isns_delete(struct isns *is);
 364 void                    isns_register(struct isns *isns, struct isns *oldisns);
 365 void                    isns_check(struct isns *isns);
 366 void                    isns_deregister(struct isns *isns);
 367
 368 struct pport            *pport_new(struct conf *conf, const char *name,
 369                             uint32_t ctl_port);
 370 struct pport            *pport_find(const struct conf *conf, const char *name);
 371 struct pport            *pport_copy(struct pport *pport, struct conf *conf);
 372 void                    pport_delete(struct pport *pport);
 373
 374 struct port             *port_new(struct conf *conf, struct target *target,
 375                             struct portal_group *pg);
 376 struct port             *port_new_ioctl(struct conf *conf, struct target *target,
 377                             int pp, int vp);
 378 struct port             *port_new_pp(struct conf *conf, struct target *target,
 379                             struct pport *pp);
 380 struct port             *port_find(const struct conf *conf, const char *name);
 381 struct port             *port_find_in_pg(const struct portal_group *pg,
 382                             const char *target);
 383 void                    port_delete(struct port *port);
 384 int                     port_is_dummy(struct port *port);
 385
 386 struct target           *target_new(struct conf *conf, const char *name);
 387 void                    target_delete(struct target *target);
 388 struct target           *target_find(struct conf *conf,
 389                             const char *name);
 390 int                     target_set_redirection(struct target *target,
 391                             const char *addr);
 392
 393 struct lun              *lun_new(struct conf *conf, const char *name);
 394 void                    lun_delete(struct lun *lun);
 395 struct lun              *lun_find(const struct conf *conf, const char *name);
 396 void                    lun_set_backend(struct lun *lun, const char *value);
 397 void                    lun_set_device_type(struct lun *lun, uint8_t value);
 398 void                    lun_set_blocksize(struct lun *lun, size_t value);
 399 void                    lun_set_device_id(struct lun *lun, const char *value);
 400 void                    lun_set_path(struct lun *lun, const char *value);
 401 void                    lun_set_scsiname(struct lun *lun, const char *value);
 402 void                    lun_set_serial(struct lun *lun, const char *value);
 403 void                    lun_set_size(struct lun *lun, size_t value);
 404 void                    lun_set_ctl_lun(struct lun *lun, uint32_t value);
 405
 406 struct option           *option_new(struct options *os,
 407                             const char *name, const char *value);
 408 void                    option_delete(struct options *os, struct option *co);
 409 struct option           *option_find(const struct options *os, const char *name);
 410 void                    option_set(struct option *o, const char *value);
 411
 412 void                    kernel_init(void);
 413 int                     kernel_lun_add(struct lun *lun);
 414 int                     kernel_lun_modify(struct lun *lun);
 415 int                     kernel_lun_remove(struct lun *lun);
 416 void                    kernel_handoff(struct connection *conn);
 417 void                    kernel_limits(const char *offload,
 418                             int *max_recv_data_segment_length,
 419                             int *max_send_data_segment_length,
 420                             int *max_burst_length,
 421                             int *first_burst_length);
 422 int                     kernel_port_add(struct port *port);
 423 int                     kernel_port_update(struct port *port, struct port *old);
 424 int                     kernel_port_remove(struct port *port);
 425 void                    kernel_capsicate(void);
 426
 427 #ifdef ICL_KERNEL_PROXY
 428 void                    kernel_listen(struct addrinfo *ai, bool iser,
 429                             int portal_id);
 430 void                    kernel_accept(int *connection_id, int *portal_id,
 431                             struct sockaddr *client_sa,
 432                             socklen_t *client_salen);
 433 void                    kernel_send(struct pdu *pdu);
 434 void                    kernel_receive(struct pdu *pdu);
 435 #endif
 436
 437 struct keys             *keys_new(void);
 438 void                    keys_delete(struct keys *keys);
 439 void                    keys_load(struct keys *keys, const struct pdu *pdu);
 440 void                    keys_save(struct keys *keys, struct pdu *pdu);
 441 const char              *keys_find(struct keys *keys, const char *name);
 442 void                    keys_add(struct keys *keys,
 443                             const char *name, const char *value);
 444 void                    keys_add_int(struct keys *keys,
 445                             const char *name, int value);
 446
 447 struct pdu              *pdu_new(struct connection *conn);
 448 struct pdu              *pdu_new_response(struct pdu *request);
 449 void                    pdu_delete(struct pdu *pdu);
 450 void                    pdu_receive(struct pdu *request);
 451 void                    pdu_send(struct pdu *response);
 452
 453 void                    login(struct connection *conn);
 454
 455 void                    discovery(struct connection *conn);
 456
 457 void                    log_init(int level);
 458 void                    log_set_peer_name(const char *name);
 459 void                    log_set_peer_addr(const char *addr);
 460 void                    log_err(int, const char *, ...)
 461                             __dead2 __printflike(2, 3);
 462 void                    log_errx(int, const char *, ...)
 463                             __dead2 __printflike(2, 3);
 464 void                    log_warn(const char *, ...) __printflike(1, 2);
 465 void                    log_warnx(const char *, ...) __printflike(1, 2);
 466 void                    log_debugx(const char *, ...) __printflike(1, 2);
 467
 468 char                    *checked_strdup(const char *);
 469 bool                    valid_iscsi_name(const char *name);
 470 void                    set_timeout(int timeout, int fatal);
 471 bool                    timed_out(void);
 472
 473 #endif /* !CTLD_H */