iscsiadm: print session and session info running through ifaces in iface mode

If you run
iscsiadm -m iface -P 1
or
iscsiadm -m iface -I $my_iface -P 1

we print the iface info and if possible the host number and state
(only for offload hbas).

The P2 level will print the session running through a iface.

The P3 level will print the negotiated iscsi params for each session.

The P4 level will print the scsi devices accessed through each
session.

1 files changed, 47 insertions, 0 deletions

diff --git a/usr/session_info.h b/usr/session_info.h
new file mode 100644
index 0000000..7a22aee
--- /dev/null
+++ b/usr/session_info.h
@@ -0,0 +1,47 @@
+#ifndef SESSION_INFO_H
+#define SESSION_INFO_H
+#include <sys/types.h>
+
+#include "sysfs.h"
+#include "types.h"
+#include "iscsi_proto.h"
+#include "config.h"
+
+struct list;
+
+struct session_info {
+	struct list_head list;
+	/* local info */
+	struct iface_rec iface;
+	int sid;
+
+	/* remote info */
+	char targetname[TARGET_NAME_MAXLEN + 1];
+	int tpgt;
+	char address[NI_MAXHOST + 1];
+	int port;
+	char persistent_address[NI_MAXHOST + 1];
+	int persistent_port;
+};
+
+typedef int (session_match_info_fn_t)(void *data, struct session_info *info);
+
+struct session_link_info {
+	struct list_head *list;
+	session_match_info_fn_t *match_fn;
+	void *data;
+};
+
+#define SESSION_INFO_IFACE		0x1
+#define SESSION_INFO_ISCSI_PARAMS	0x2
+#define SESSION_INFO_ISCSI_STATE	0x4
+#define SESSION_INFO_SCSI_DEVS		0x8
+#define SESSION_INFO_HOST_DEVS		0x10
+
+extern int session_info_create_list(void *data, struct session_info *info);
+extern void session_info_free_list(struct list_head *list);
+extern int session_info_print(int info_level, struct session_info *match_info);
+extern void session_info_print_tree(struct list_head *list, char *prefix,
+				    unsigned int flags);
+
+#endif