Add basic iSNS client to the iSCSI target.

This makes ctld(8) register its iSCSI targets and portals on configured
iSNS servers to allow initiators find them without active discovery.

Fetching of allowed initiators from iSNS is not implemented now, so target
ACLs still should be configured manually.

Reviewed by:	trasz@
MFC after:	1 month
Sponsored by:	iXsystems, Inc.

1 files changed, 17 insertions, 0 deletions

diff --git a/usr.sbin/ctld/ctld.h b/usr.sbin/ctld/ctld.h
index f0a03bd..1c7d4cb 100644
--- a/usr.sbin/ctld/ctld.h
+++ b/usr.sbin/ctld/ctld.h
@@ -146,11 +146,21 @@ struct target {
 	char				*t_alias;
 };
 
+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(, target)		conf_targets;
 	TAILQ_HEAD(, auth_group)	conf_auth_groups;
 	TAILQ_HEAD(, portal_group)	conf_portal_groups;
+	TAILQ_HEAD(, isns)		conf_isns;
+	int				conf_isns_period;
+	int				conf_isns_timeout;
 	int				conf_debug;
 	int				conf_timeout;
 	int				conf_maxproc;
@@ -281,6 +291,12 @@ struct portal_group	*portal_group_find(const struct conf *conf,
 int			portal_group_add_listen(struct portal_group *pg,
 			    const char *listen, bool iser);
 
+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 target		*target_new(struct conf *conf, const char *name);
 void			target_delete(struct target *target);
 struct target		*target_find(struct conf *conf,
@@ -358,6 +374,7 @@ void			log_debugx(const char *, ...) __printflike(1, 2);
 
 char			*checked_strdup(const char *);
 bool			valid_iscsi_name(const char *name);
+void			set_timeout(int timeout, int fatal);
 bool			timed_out(void);
 
 #endif /* !CTLD_H */