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
  47 #define MAX_NAME_LEN                    223
  48 #define MAX_DATA_SEGMENT_LENGTH         (128 * 1024)
  49 #define MAX_BURST_LENGTH                16776192
  50
  51 struct auth {
  52         TAILQ_ENTRY(auth)               a_next;
  53         struct auth_group               *a_auth_group;
  54         char                            *a_user;
  55         char                            *a_secret;
  56         char                            *a_mutual_user;
  57         char                            *a_mutual_secret;
  58 };
  59
  60 struct auth_name {
  61         TAILQ_ENTRY(auth_name)          an_next;
  62         struct auth_group               *an_auth_group;
  63         char                            *an_initator_name;
  64 };
  65
  66 struct auth_portal {
  67         TAILQ_ENTRY(auth_portal)        ap_next;
  68         struct auth_group               *ap_auth_group;
  69         char                            *ap_initator_portal;
  70         struct sockaddr_storage         ap_sa;
  71         int                             ap_mask;
  72 };
  73
  74 #define AG_TYPE_UNKNOWN                 0
  75 #define AG_TYPE_DENY                    1
  76 #define AG_TYPE_NO_AUTHENTICATION       2
  77 #define AG_TYPE_CHAP                    3
  78 #define AG_TYPE_CHAP_MUTUAL             4
  79
  80 struct auth_group {
  81         TAILQ_ENTRY(auth_group)         ag_next;
  82         struct conf                     *ag_conf;
  83         char                            *ag_name;
  84         struct target                   *ag_target;
  85         int                             ag_type;
  86         TAILQ_HEAD(, auth)              ag_auths;
  87         TAILQ_HEAD(, auth_name)         ag_names;
  88         TAILQ_HEAD(, auth_portal)       ag_portals;
  89 };
  90
  91 struct portal {
  92         TAILQ_ENTRY(portal)             p_next;
  93         struct portal_group             *p_portal_group;
  94         bool                            p_iser;
  95         char                            *p_listen;
  96         struct addrinfo                 *p_ai;
  97 #ifdef ICL_KERNEL_PROXY
  98         int                             p_id;
  99 #endif
 100
 101         TAILQ_HEAD(, target)            p_targets;
 102         int                             p_socket;
 103 };
 104
 105 struct portal_group {
 106         TAILQ_ENTRY(portal_group)       pg_next;
 107         struct conf                     *pg_conf;
 108         char                            *pg_name;
 109         struct auth_group               *pg_discovery_auth_group;
 110         bool                            pg_unassigned;
 111         TAILQ_HEAD(, portal)            pg_portals;
 112
 113         uint16_t                        pg_tag;
 114 };
 115
 116 struct lun_option {
 117         TAILQ_ENTRY(lun_option)         lo_next;
 118         struct lun                      *lo_lun;
 119         char                            *lo_name;
 120         char                            *lo_value;
 121 };
 122
 123 struct lun {
 124         TAILQ_ENTRY(lun)                l_next;
 125         TAILQ_HEAD(, lun_option)        l_options;
 126         struct target                   *l_target;
 127         int                             l_lun;
 128         char                            *l_backend;
 129         int                             l_blocksize;
 130         char                            *l_device_id;
 131         char                            *l_path;
 132         char                            *l_serial;
 133         int64_t                         l_size;
 134
 135         int                             l_ctl_lun;
 136 };
 137
 138 struct target {
 139         TAILQ_ENTRY(target)             t_next;
 140         TAILQ_HEAD(, lun)               t_luns;
 141         struct conf                     *t_conf;
 142         struct auth_group               *t_auth_group;
 143         struct portal_group             *t_portal_group;
 144         char                            *t_name;
 145         char                            *t_alias;
 146 };
 147
 148 struct conf {
 149         char                            *conf_pidfile_path;
 150         TAILQ_HEAD(, target)            conf_targets;
 151         TAILQ_HEAD(, auth_group)        conf_auth_groups;
 152         TAILQ_HEAD(, portal_group)      conf_portal_groups;
 153         int                             conf_debug;
 154         int                             conf_timeout;
 155         int                             conf_maxproc;
 156
 157         uint16_t                        conf_last_portal_group_tag;
 158 #ifdef ICL_KERNEL_PROXY
 159         int                             conf_portal_id;
 160 #endif
 161         struct pidfh                    *conf_pidfh;
 162
 163         bool                            conf_default_pg_defined;
 164         bool                            conf_default_ag_defined;
 165         bool                            conf_kernel_port_on;
 166 };
 167
 168 #define CONN_SESSION_TYPE_NONE          0
 169 #define CONN_SESSION_TYPE_DISCOVERY     1
 170 #define CONN_SESSION_TYPE_NORMAL        2
 171
 172 #define CONN_DIGEST_NONE                0
 173 #define CONN_DIGEST_CRC32C              1
 174
 175 struct connection {
 176         struct portal           *conn_portal;
 177         struct target           *conn_target;
 178         int                     conn_socket;
 179         int                     conn_session_type;
 180         char                    *conn_initiator_name;
 181         char                    *conn_initiator_addr;
 182         char                    *conn_initiator_alias;
 183         uint8_t                 conn_initiator_isid[6];
 184         struct sockaddr_storage conn_initiator_sa;
 185         uint32_t                conn_cmdsn;
 186         uint32_t                conn_statsn;
 187         size_t                  conn_max_data_segment_length;
 188         size_t                  conn_max_burst_length;
 189         int                     conn_immediate_data;
 190         int                     conn_header_digest;
 191         int                     conn_data_digest;
 192 };
 193
 194 struct pdu {
 195         struct connection       *pdu_connection;
 196         struct iscsi_bhs        *pdu_bhs;
 197         char                    *pdu_data;
 198         size_t                  pdu_data_len;
 199 };
 200
 201 #define KEYS_MAX        1024
 202
 203 struct keys {
 204         char            *keys_names[KEYS_MAX];
 205         char            *keys_values[KEYS_MAX];
 206         char            *keys_data;
 207         size_t          keys_data_len;
 208 };
 209
 210 struct conf             *conf_new(void);
 211 struct conf             *conf_new_from_file(const char *path);
 212 struct conf             *conf_new_from_kernel(void);
 213 void                    conf_delete(struct conf *conf);
 214 int                     conf_verify(struct conf *conf);
 215
 216 struct auth_group       *auth_group_new(struct conf *conf, const char *name);
 217 void                    auth_group_delete(struct auth_group *ag);
 218 struct auth_group       *auth_group_find(const struct conf *conf,
 219                             const char *name);
 220 int                     auth_group_set_type_str(struct auth_group *ag,
 221                             const char *type);
 222
 223 const struct auth       *auth_new_chap(struct auth_group *ag,
 224                             const char *user, const char *secret);
 225 const struct auth       *auth_new_chap_mutual(struct auth_group *ag,
 226                             const char *user, const char *secret,
 227                             const char *user2, const char *secret2);
 228 const struct auth       *auth_find(const struct auth_group *ag,
 229                             const char *user);
 230
 231 const struct auth_name  *auth_name_new(struct auth_group *ag,
 232                             const char *initiator_name);
 233 bool                    auth_name_defined(const struct auth_group *ag);
 234 const struct auth_name  *auth_name_find(const struct auth_group *ag,
 235                             const char *initiator_name);
 236
 237 const struct auth_portal        *auth_portal_new(struct auth_group *ag,
 238                                     const char *initiator_portal);
 239 bool                    auth_portal_defined(const struct auth_group *ag);
 240 const struct auth_portal        *auth_portal_find(const struct auth_group *ag,
 241                                     const struct sockaddr_storage *sa);
 242
 243 struct portal_group     *portal_group_new(struct conf *conf, const char *name);
 244 void                    portal_group_delete(struct portal_group *pg);
 245 struct portal_group     *portal_group_find(const struct conf *conf,
 246                             const char *name);
 247 int                     portal_group_add_listen(struct portal_group *pg,
 248                             const char *listen, bool iser);
 249
 250 struct target           *target_new(struct conf *conf, const char *name);
 251 void                    target_delete(struct target *target);
 252 struct target           *target_find(struct conf *conf,
 253                             const char *name);
 254
 255 struct lun              *lun_new(struct target *target, int lun_id);
 256 void                    lun_delete(struct lun *lun);
 257 struct lun              *lun_find(const struct target *target, int lun_id);
 258 void                    lun_set_backend(struct lun *lun, const char *value);
 259 void                    lun_set_blocksize(struct lun *lun, size_t value);
 260 void                    lun_set_device_id(struct lun *lun, const char *value);
 261 void                    lun_set_path(struct lun *lun, const char *value);
 262 void                    lun_set_serial(struct lun *lun, const char *value);
 263 void                    lun_set_size(struct lun *lun, size_t value);
 264 void                    lun_set_ctl_lun(struct lun *lun, uint32_t value);
 265
 266 struct lun_option       *lun_option_new(struct lun *lun,
 267                             const char *name, const char *value);
 268 void                    lun_option_delete(struct lun_option *clo);
 269 struct lun_option       *lun_option_find(const struct lun *lun,
 270                             const char *name);
 271 void                    lun_option_set(struct lun_option *clo,
 272                             const char *value);
 273
 274 void                    kernel_init(void);
 275 int                     kernel_lun_add(struct lun *lun);
 276 int                     kernel_lun_resize(struct lun *lun);
 277 int                     kernel_lun_remove(struct lun *lun);
 278 void                    kernel_handoff(struct connection *conn);
 279 int                     kernel_port_add(struct target *targ);
 280 int                     kernel_port_remove(struct target *targ);
 281 void                    kernel_capsicate(void);
 282
 283 #ifdef ICL_KERNEL_PROXY
 284 void                    kernel_listen(struct addrinfo *ai, bool iser,
 285                             int portal_id);
 286 void                    kernel_accept(int *connection_id, int *portal_id,
 287                             struct sockaddr *client_sa,
 288                             socklen_t *client_salen);
 289 void                    kernel_send(struct pdu *pdu);
 290 void                    kernel_receive(struct pdu *pdu);
 291 #endif
 292
 293 struct keys             *keys_new(void);
 294 void                    keys_delete(struct keys *keys);
 295 void                    keys_load(struct keys *keys, const struct pdu *pdu);
 296 void                    keys_save(struct keys *keys, struct pdu *pdu);
 297 const char              *keys_find(struct keys *keys, const char *name);
 298 int                     keys_find_int(struct keys *keys, const char *name);
 299 void                    keys_add(struct keys *keys,
 300                             const char *name, const char *value);
 301 void                    keys_add_int(struct keys *keys,
 302                             const char *name, int value);
 303
 304 struct pdu              *pdu_new(struct connection *conn);
 305 struct pdu              *pdu_new_response(struct pdu *request);
 306 void                    pdu_delete(struct pdu *pdu);
 307 void                    pdu_receive(struct pdu *request);
 308 void                    pdu_send(struct pdu *response);
 309
 310 void                    login(struct connection *conn);
 311
 312 void                    discovery(struct connection *conn);
 313
 314 void                    log_init(int level);
 315 void                    log_set_peer_name(const char *name);
 316 void                    log_set_peer_addr(const char *addr);
 317 void                    log_err(int, const char *, ...)
 318                             __dead2 __printflike(2, 3);
 319 void                    log_errx(int, const char *, ...)
 320                             __dead2 __printflike(2, 3);
 321 void                    log_warn(const char *, ...) __printflike(1, 2);
 322 void                    log_warnx(const char *, ...) __printflike(1, 2);
 323 void                    log_debugx(const char *, ...) __printflike(1, 2);
 324
 325 char                    *checked_strdup(const char *);
 326 bool                    valid_iscsi_name(const char *name);
 327 bool                    timed_out(void);
 328
 329 #endif /* !CTLD_H */