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freebsd-nq/usr.sbin/ctld/ctld.h
John Baldwin 6378393308 Add an internal libiscsiutil library. 
Move some of the code duplicated between ctld(8) and iscsid(8) into a
libiscsiutil library.

Sharing the low-level PDU code did require having a
'struct connection' base class with a method table to permit separate
initiator vs target behavior (e.g. in handling proxy PDUs).

Reviewed by:	mav, emaste
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D33544
2021-12-22 10:43:11 -08:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 The FreeBSD Foundation
*
* 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>
#endif
#include <sys/socket.h>
#include <stdbool.h>
#include <libiscsiutil.h>
#include <libutil.h>
#define DEFAULT_CONFIG_PATH "/etc/ctl.conf"
#define DEFAULT_PIDFILE "/var/run/ctld.pid"
#define DEFAULT_BLOCKSIZE 512
#define DEFAULT_CD_BLOCKSIZE 2048
#define MAX_LUNS 1024
#define MAX_NAME_LEN 223
#define MAX_DATA_SEGMENT_LENGTH (128 * 1024)
#define SOCKBUF_SIZE 1048576
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_initiator_name;
};
struct auth_portal {
TAILQ_ENTRY(auth_portal) ap_next;
struct auth_group *ap_auth_group;
char *ap_initiator_portal;
struct sockaddr_storage ap_sa;
int ap_mask;
};
#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;
};
TAILQ_HEAD(options, option);
#define PG_FILTER_UNKNOWN 0
#define PG_FILTER_NONE 1
#define PG_FILTER_PORTAL 2
#define PG_FILTER_PORTAL_NAME 3
#define PG_FILTER_PORTAL_NAME_AUTH 4
struct portal_group {
TAILQ_ENTRY(portal_group) pg_next;
struct conf *pg_conf;
struct options pg_options;
char *pg_name;
struct auth_group *pg_discovery_auth_group;
int pg_discovery_filter;
int pg_foreign;
bool pg_unassigned;
TAILQ_HEAD(, portal) pg_portals;
TAILQ_HEAD(, port) pg_ports;
char *pg_offload;
char *pg_redirection;
int pg_dscp;
int pg_pcp;
uint16_t pg_tag;
};
struct pport {
TAILQ_ENTRY(pport) pp_next;
TAILQ_HEAD(, port) pp_ports;
struct conf *pp_conf;
char *pp_name;
uint32_t pp_ctl_port;
};
struct port {
TAILQ_ENTRY(port) p_next;
TAILQ_ENTRY(port) p_pgs;
TAILQ_ENTRY(port) p_pps;
TAILQ_ENTRY(port) p_ts;
struct conf *p_conf;
char *p_name;
struct auth_group *p_auth_group;
struct portal_group *p_portal_group;
struct pport *p_pport;
struct target *p_target;
int p_ioctl_port;
int p_ioctl_pp;
int p_ioctl_vp;
uint32_t p_ctl_port;
};
struct option {
TAILQ_ENTRY(option) o_next;
char *o_name;
char *o_value;
};
struct lun {
TAILQ_ENTRY(lun) l_next;
struct conf *l_conf;
struct options l_options;
char *l_name;
char *l_backend;
uint8_t l_device_type;
int l_blocksize;
char *l_device_id;
char *l_path;
char *l_scsiname;
char *l_serial;
int64_t l_size;
int l_ctl_lun;
};
struct target {
TAILQ_ENTRY(target) t_next;
struct conf *t_conf;
struct lun *t_luns[MAX_LUNS];
struct auth_group *t_auth_group;
TAILQ_HEAD(, port) t_ports;
char *t_name;
char *t_alias;
char *t_redirection;
};
struct isns {
TAILQ_ENTRY(isns) i_next;
struct conf *i_conf;
char *i_addr;
struct addrinfo *i_ai;
};
struct conf {
char *conf_pidfile_path;
TAILQ_HEAD(, lun) conf_luns;
TAILQ_HEAD(, target) conf_targets;
TAILQ_HEAD(, auth_group) conf_auth_groups;
TAILQ_HEAD(, port) conf_ports;
TAILQ_HEAD(, portal_group) conf_portal_groups;
TAILQ_HEAD(, pport) conf_pports;
TAILQ_HEAD(, isns) conf_isns;
int conf_isns_period;
int conf_isns_timeout;
int conf_debug;
int conf_timeout;
int conf_maxproc;
#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
struct ctld_connection {
struct connection conn;
struct portal *conn_portal;
struct port *conn_port;
struct target *conn_target;
int conn_session_type;
char *conn_initiator_name;
char *conn_initiator_addr;
char *conn_initiator_alias;
uint8_t conn_initiator_isid[6];
struct sockaddr_storage conn_initiator_sa;
int conn_max_recv_data_segment_limit;
int conn_max_send_data_segment_limit;
int conn_max_burst_limit;
int conn_first_burst_limit;
const char *conn_user;
struct chap *conn_chap;
};
int parse_conf(struct conf *conf, const char *path);
int uclparse_conf(struct conf *conf, const char *path);
struct conf *conf_new(void);
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(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);
int auth_name_check(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 struct sockaddr_storage *sa);
int auth_portal_check(const struct auth_group *ag,
const struct sockaddr_storage *sa);
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);
int portal_group_set_filter(struct portal_group *pg,
const char *filter);
int portal_group_set_offload(struct portal_group *pg,
const char *offload);
int portal_group_set_redirection(struct portal_group *pg,
const char *addr);
int isns_new(struct conf *conf, const char *addr);
void isns_delete(struct isns *is);
void isns_register(struct isns *isns, struct isns *oldisns);
void isns_check(struct isns *isns);
void isns_deregister(struct isns *isns);
struct pport *pport_new(struct conf *conf, const char *name,
uint32_t ctl_port);
struct pport *pport_find(const struct conf *conf, const char *name);
struct pport *pport_copy(struct pport *pport, struct conf *conf);
void pport_delete(struct pport *pport);
struct port *port_new(struct conf *conf, struct target *target,
struct portal_group *pg);
struct port *port_new_ioctl(struct conf *conf, struct target *target,
int pp, int vp);
struct port *port_new_pp(struct conf *conf, struct target *target,
struct pport *pp);
struct port *port_find(const struct conf *conf, const char *name);
struct port *port_find_in_pg(const struct portal_group *pg,
const char *target);
void port_delete(struct port *port);
int port_is_dummy(struct port *port);
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);
int target_set_redirection(struct target *target,
const char *addr);
struct lun *lun_new(struct conf *conf, const char *name);
void lun_delete(struct lun *lun);
struct lun *lun_find(const struct conf *conf, const char *name);
void lun_set_backend(struct lun *lun, const char *value);
void lun_set_device_type(struct lun *lun, uint8_t 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_scsiname(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 option *option_new(struct options *os,
const char *name, const char *value);
void option_delete(struct options *os, struct option *co);
struct option *option_find(const struct options *os, const char *name);
void option_set(struct option *o, const char *value);
void kernel_init(void);
int kernel_lun_add(struct lun *lun);
int kernel_lun_modify(struct lun *lun);
int kernel_lun_remove(struct lun *lun);
void kernel_handoff(struct ctld_connection *conn);
void kernel_limits(const char *offload,
int *max_recv_data_segment_length,
int *max_send_data_segment_length,
int *max_burst_length,
int *first_burst_length);
int kernel_port_add(struct port *port);
int kernel_port_update(struct port *port, struct port *old);
int kernel_port_remove(struct port *port);
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
void login(struct ctld_connection *conn);
void discovery(struct ctld_connection *conn);
bool valid_iscsi_name(const char *name);
void set_timeout(int timeout, int fatal);
#endif /* !CTLD_H */
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