iscsi tools: use open-isns services

This replaces the native isns code with open-isns's libisns.
I included the open-isns code in the open-iscsi tarball
to make distribution easier since some distros use different
isns clients and may not want to carry open-isns.
This is based on open-isns commit
5e09f36d3446e41de0b8361601ffec4cd140d513.

Changes in iSNS behavior/use:

- To do discovery you must pass the ip and optionally the
port to iscsiadm:

iscsiadm -m discovery -t st -p 10.15.0.9

This command accepts the same ops as sendtargets so you can
add/remove/update the node records that are created.

It also supports ifaces properly now.

- isns.address and isns.port in iscsid.conf are no longer
used.

- ESI is temporarily not supported. This will be fixed in the
next patch when SCNs support is added.

- The iscsiadm isns discovery command is not marked as stable.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>

1 files changed, 167 insertions, 0 deletions

diff --git a/utils/open-isns/objects.h b/utils/open-isns/objects.h
new file mode 100644
index 0000000..93ce208
--- /dev/null
+++ b/utils/open-isns/objects.h
@@ -0,0 +1,167 @@
+/*
+ * iSNS object model
+ *
+ * Copyright (C) 2007 Olaf Kirch <olaf.kirch@oracle.com>
+ */
+
+#ifndef ISNS_OBJECTS_H
+#define ISNS_OBJECTS_H
+
+#include "isns.h"
+#include "attrs.h"
+
+enum isns_object_id {
+	ISNS_OBJECT_TYPE_ENTITY = 1,
+	ISNS_OBJECT_TYPE_NODE,
+	ISNS_OBJECT_TYPE_PORTAL,
+	ISNS_OBJECT_TYPE_PG,
+	ISNS_OBJECT_TYPE_DD,
+	ISNS_OBJECT_TYPE_DDSET,
+	ISNS_OBJECT_TYPE_POLICY,
+	ISNS_OBJECT_TYPE_FC_PORT,
+	ISNS_OBJECT_TYPE_FC_NODE,
+
+	__ISNS_OBJECT_TYPE_MAX
+};
+
+
+struct isns_object_template {
+	const char *		iot_name;
+	unsigned int		iot_handle;	/* internal handle */
+	unsigned int		iot_num_attrs;
+	unsigned int		iot_num_keys;
+	uint32_t *		iot_attrs;
+	uint32_t *		iot_keys;
+	uint32_t		iot_index;
+	uint32_t		iot_next_index;
+
+	isns_object_template_t *iot_container;
+
+	unsigned int		iot_relation_type;
+	isns_relation_t *	(*iot_build_relation)(isns_db_t *,
+					isns_object_t *,
+					const isns_object_list_t *);
+
+	unsigned int		iot_vendor_specific : 1;
+};
+
+struct isns_object {
+	/* There are two kinds of users of an object
+	 *  -	Temporary references that result from the
+	 *	object being examined; being on a list,
+	 *	etc. The main purpose of these references
+	 *	is to make sure the object doesn't go away
+	 *	while being used.
+	 *
+	 *	These are accounted for by ie_users.
+	 *
+	 *  -	Permanent references that result from the
+	 *	object being references by other objects
+	 *	(usually relations) such as a Portal Group,
+	 *	or a Discovery Domain.
+	 *
+	 *	These are accounted for by ie_references.
+	 *
+	 *	The main purpose of these references is to
+	 *	model some of the weirder life cycle states
+	 *	described in RFC 4711.
+	 *
+	 * Every reference via ie_references implies a
+	 * reference via ie_users.
+	 */
+	unsigned int		ie_users;
+	unsigned int		ie_references;
+
+	uint32_t		ie_index;
+
+	unsigned int		ie_state;
+	unsigned int		ie_flags;
+	time_t			ie_mtime;
+
+	uint32_t		ie_scn_mask;	/* Events this node listens for */
+	uint32_t		ie_scn_bits;	/* Current event bits */
+
+	isns_attr_list_t	ie_attrs;
+	isns_object_t *		ie_container;
+	isns_object_template_t *ie_template;
+
+	isns_relation_t *	ie_relation;
+	isns_object_list_t	ie_children;
+
+	/* Bit vector describing DD membership */
+	isns_bitvector_t *	ie_membership;
+
+	/* Support for virtual objects */
+	int			(*ie_rebuild)(isns_object_t *, isns_db_t *);
+};
+
+typedef struct isns_object_ref {
+	isns_object_t *		obj;
+} isns_object_ref_t;
+
+enum {
+	ISNS_RELATION_NONE = 0,
+	ISNS_RELATION_PORTAL_GROUP,
+};
+
+struct isns_relation {
+	unsigned int		ir_type;
+	unsigned int		ir_users;
+	isns_object_t *		ir_object;
+	isns_object_ref_t	ir_subordinate[2];
+};
+
+typedef struct isns_relation_soup isns_relation_soup_t;
+
+typedef struct isns_relation_list isns_relation_list_t;
+struct isns_relation_list {
+	unsigned int		irl_count;
+	isns_relation_t **	irl_data;
+};
+#define ISNS_RELATION_LIST_INIT { .irl_count = 0, .irl_data = NULL }
+
+#define ISNS_OBJECT_DIRTY	0x0001
+#define ISNS_OBJECT_PRIVATE	0x0002
+#define ISNS_OBJECT_DEAD	0x0004
+
+enum {
+	ISNS_OBJECT_STATE_LARVAL,
+	ISNS_OBJECT_STATE_MATURE,
+	ISNS_OBJECT_STATE_LIMBO,
+	ISNS_OBJECT_STATE_DEAD,
+};
+
+extern int	isns_object_remove_member(isns_object_t *obj,
+				const isns_attr_t *attr,
+				const uint32_t *subordinate_tags);
+
+extern void	isns_object_reference_set(isns_object_ref_t *ref,
+				isns_object_t *obj);
+extern void	isns_object_reference_drop(isns_object_ref_t *ref);
+
+extern const char *isns_object_state_string(unsigned int);
+
+extern isns_object_template_t *isns_object_template_by_name(const char *);
+extern int	isns_object_is_valid_container(const isns_object_t *,
+				isns_object_template_t *);
+
+extern void	isns_object_set_scn_mask(isns_object_t *, uint32_t);
+
+extern isns_object_t *isns_create_default_domain(void);
+
+/*
+ * Helper macros for object type check
+ */
+#define __ISNS_OBJECT_TYPE_CHECK(obj, type) \
+		((obj)->ie_template == &isns_##type##_template)
+#define ISNS_IS_ENTITY(obj)	__ISNS_OBJECT_TYPE_CHECK(obj, entity)
+#define ISNS_IS_ISCSI_NODE(obj)	__ISNS_OBJECT_TYPE_CHECK(obj, iscsi_node)
+#define ISNS_IS_FC_PORT(obj)	__ISNS_OBJECT_TYPE_CHECK(obj, fc_port)
+#define ISNS_IS_FC_NODE(obj)	__ISNS_OBJECT_TYPE_CHECK(obj, fc_node)
+#define ISNS_IS_PORTAL(obj)	__ISNS_OBJECT_TYPE_CHECK(obj, portal)
+#define ISNS_IS_PG(obj)		__ISNS_OBJECT_TYPE_CHECK(obj, iscsi_pg)
+#define ISNS_IS_POLICY(obj)	__ISNS_OBJECT_TYPE_CHECK(obj, policy)
+#define ISNS_IS_DD(obj)		__ISNS_OBJECT_TYPE_CHECK(obj, dd)
+#define ISNS_IS_DDSET(obj)	__ISNS_OBJECT_TYPE_CHECK(obj, ddset)
+
+#endif /* ISNS_OBJECTS_H */