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freebsd-skq/usr.sbin/ctld/ctld.h
Alexander Motin 917d38fb99 Create separate CTL port for every iSCSI target (and maybe portal group). 
Having single port for all iSCSI connections makes problematic implementing
some more advanced SCSI functionality in CTL, that require proper ports
enumeration and identification.

This change extends CTL iSCSI API, making ctld daemon to control list of
iSCSI ports in CTL.  When new target is defined in config fine, ctld will
create respective port in CTL.  When target is removed -- port will be
also removed after all active commands through that port properly aborted.
This change require ctld to be rebuilt to match the kernel.

As a minor side effect, this allows to have iSCSI targets without LUNs.
While that may look odd and not very useful, that is not incorrect.
2014-07-05 18:15:00 +00:00

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/*-
* Copyright (c) 2012 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef CTLD_H
#define CTLD_H
#include <sys/queue.h>
#ifdef ICL_KERNEL_PROXY
#include <sys/types.h>
#include <sys/socket.h>
#endif
#include <stdbool.h>
#include <libutil.h>
#define DEFAULT_CONFIG_PATH "/etc/ctl.conf"
#define DEFAULT_PIDFILE "/var/run/ctld.pid"
#define DEFAULT_BLOCKSIZE 512
#define MAX_NAME_LEN 223
#define MAX_DATA_SEGMENT_LENGTH (128 * 1024)
#define MAX_BURST_LENGTH 16776192
struct auth {
TAILQ_ENTRY(auth) a_next;
struct auth_group *a_auth_group;
char *a_user;
char *a_secret;
char *a_mutual_user;
char *a_mutual_secret;
};
struct auth_name {
TAILQ_ENTRY(auth_name) an_next;
struct auth_group *an_auth_group;
char *an_initator_name;
};
struct auth_portal {
TAILQ_ENTRY(auth_portal) ap_next;
struct auth_group *ap_auth_group;
char *ap_initator_portal;
};
#define AG_TYPE_UNKNOWN 0
#define AG_TYPE_DENY 1
#define AG_TYPE_NO_AUTHENTICATION 2
#define AG_TYPE_CHAP 3
#define AG_TYPE_CHAP_MUTUAL 4
struct auth_group {
TAILQ_ENTRY(auth_group) ag_next;
struct conf *ag_conf;
char *ag_name;
struct target *ag_target;
int ag_type;
TAILQ_HEAD(, auth) ag_auths;
TAILQ_HEAD(, auth_name) ag_names;
TAILQ_HEAD(, auth_portal) ag_portals;
};
struct portal {
TAILQ_ENTRY(portal) p_next;
struct portal_group *p_portal_group;
bool p_iser;
char *p_listen;
struct addrinfo *p_ai;
#ifdef ICL_KERNEL_PROXY
int p_id;
#endif
TAILQ_HEAD(, target) p_targets;
int p_socket;
};
struct portal_group {
TAILQ_ENTRY(portal_group) pg_next;
struct conf *pg_conf;
char *pg_name;
struct auth_group *pg_discovery_auth_group;
bool pg_unassigned;
TAILQ_HEAD(, portal) pg_portals;
uint16_t pg_tag;
};
struct lun_option {
TAILQ_ENTRY(lun_option) lo_next;
struct lun *lo_lun;
char *lo_name;
char *lo_value;
};
struct lun {
TAILQ_ENTRY(lun) l_next;
TAILQ_HEAD(, lun_option) l_options;
struct target *l_target;
int l_lun;
char *l_backend;
int l_blocksize;
char *l_device_id;
char *l_path;
char *l_serial;
int64_t l_size;
int l_ctl_lun;
};
struct target {
TAILQ_ENTRY(target) t_next;
TAILQ_HEAD(, lun) t_luns;
struct conf *t_conf;
struct auth_group *t_auth_group;
struct portal_group *t_portal_group;
char *t_name;
char *t_alias;
};
struct conf {
char *conf_pidfile_path;
TAILQ_HEAD(, target) conf_targets;
TAILQ_HEAD(, auth_group) conf_auth_groups;
TAILQ_HEAD(, portal_group) conf_portal_groups;
int conf_debug;
int conf_timeout;
int conf_maxproc;
uint16_t conf_last_portal_group_tag;
#ifdef ICL_KERNEL_PROXY
int conf_portal_id;
#endif
struct pidfh *conf_pidfh;
bool conf_default_pg_defined;
bool conf_default_ag_defined;
bool conf_kernel_port_on;
};
#define CONN_SESSION_TYPE_NONE 0
#define CONN_SESSION_TYPE_DISCOVERY 1
#define CONN_SESSION_TYPE_NORMAL 2
#define CONN_DIGEST_NONE 0
#define CONN_DIGEST_CRC32C 1
struct connection {
struct portal *conn_portal;
struct target *conn_target;
int conn_socket;
int conn_session_type;
char *conn_initiator_name;
char *conn_initiator_addr;
char *conn_initiator_alias;
uint32_t conn_cmdsn;
uint32_t conn_statsn;
size_t conn_max_data_segment_length;
size_t conn_max_burst_length;
int conn_immediate_data;
int conn_header_digest;
int conn_data_digest;
};
struct pdu {
struct connection *pdu_connection;
struct iscsi_bhs *pdu_bhs;
char *pdu_data;
size_t pdu_data_len;
};
#define KEYS_MAX 1024
struct keys {
char *keys_names[KEYS_MAX];
char *keys_values[KEYS_MAX];
char *keys_data;
size_t keys_data_len;
};
struct conf *conf_new(void);
struct conf *conf_new_from_file(const char *path);
struct conf *conf_new_from_kernel(void);
void conf_delete(struct conf *conf);
int conf_verify(struct conf *conf);
struct auth_group *auth_group_new(struct conf *conf, const char *name);
void auth_group_delete(struct auth_group *ag);
struct auth_group *auth_group_find(const struct conf *conf,
const char *name);
int auth_group_set_type_str(struct auth_group *ag,
const char *type);
const struct auth *auth_new_chap(struct auth_group *ag,
const char *user, const char *secret);
const struct auth *auth_new_chap_mutual(struct auth_group *ag,
const char *user, const char *secret,
const char *user2, const char *secret2);
const struct auth *auth_find(const struct auth_group *ag,
const char *user);
const struct auth_name *auth_name_new(struct auth_group *ag,
const char *initiator_name);
bool auth_name_defined(const struct auth_group *ag);
const struct auth_name *auth_name_find(const struct auth_group *ag,
const char *initiator_name);
const struct auth_portal *auth_portal_new(struct auth_group *ag,
const char *initiator_portal);
bool auth_portal_defined(const struct auth_group *ag);
const struct auth_portal *auth_portal_find(const struct auth_group *ag,
const char *initiator_portal);
struct portal_group *portal_group_new(struct conf *conf, const char *name);
void portal_group_delete(struct portal_group *pg);
struct portal_group *portal_group_find(const struct conf *conf,
const char *name);
int portal_group_add_listen(struct portal_group *pg,
const char *listen, bool iser);
struct target *target_new(struct conf *conf, const char *name);
void target_delete(struct target *target);
struct target *target_find(struct conf *conf,
const char *name);
struct lun *lun_new(struct target *target, int lun_id);
void lun_delete(struct lun *lun);
struct lun *lun_find(const struct target *target, int lun_id);
void lun_set_backend(struct lun *lun, const char *value);
void lun_set_blocksize(struct lun *lun, size_t value);
void lun_set_device_id(struct lun *lun, const char *value);
void lun_set_path(struct lun *lun, const char *value);
void lun_set_serial(struct lun *lun, const char *value);
void lun_set_size(struct lun *lun, size_t value);
void lun_set_ctl_lun(struct lun *lun, uint32_t value);
struct lun_option *lun_option_new(struct lun *lun,
const char *name, const char *value);
void lun_option_delete(struct lun_option *clo);
struct lun_option *lun_option_find(const struct lun *lun,
const char *name);
void lun_option_set(struct lun_option *clo,
const char *value);
void kernel_init(void);
int kernel_lun_add(struct lun *lun);
int kernel_lun_resize(struct lun *lun);
int kernel_lun_remove(struct lun *lun);
void kernel_handoff(struct connection *conn);
int kernel_port_add(struct target *targ);
int kernel_port_remove(struct target *targ);
void kernel_capsicate(void);
#ifdef ICL_KERNEL_PROXY
void kernel_listen(struct addrinfo *ai, bool iser,
int portal_id);
void kernel_accept(int *connection_id, int *portal_id,
struct sockaddr *client_sa,
socklen_t *client_salen);
void kernel_send(struct pdu *pdu);
void kernel_receive(struct pdu *pdu);
#endif
struct keys *keys_new(void);
void keys_delete(struct keys *keys);
void keys_load(struct keys *keys, const struct pdu *pdu);
void keys_save(struct keys *keys, struct pdu *pdu);
const char *keys_find(struct keys *keys, const char *name);
int keys_find_int(struct keys *keys, const char *name);
void keys_add(struct keys *keys,
const char *name, const char *value);
void keys_add_int(struct keys *keys,
const char *name, int value);
struct pdu *pdu_new(struct connection *conn);
struct pdu *pdu_new_response(struct pdu *request);
void pdu_delete(struct pdu *pdu);
void pdu_receive(struct pdu *request);
void pdu_send(struct pdu *response);
void login(struct connection *conn);
void discovery(struct connection *conn);
void log_init(int level);
void log_set_peer_name(const char *name);
void log_set_peer_addr(const char *addr);
void log_err(int, const char *, ...)
__dead2 __printflike(2, 3);
void log_errx(int, const char *, ...)
__dead2 __printflike(2, 3);
void log_warn(const char *, ...) __printflike(1, 2);
void log_warnx(const char *, ...) __printflike(1, 2);
void log_debugx(const char *, ...) __printflike(1, 2);
char *checked_strdup(const char *);
bool valid_iscsi_name(const char *name);
bool timed_out(void);
#endif /* !CTLD_H */
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