/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ISCSI_TARGET_STAT_H
#define ISCSI_TARGET_STAT_H

#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/socket.h>

/*
 * For struct iscsi_tiqn->tiqn_wwn default groups
 */
extern const struct config_item_type iscsi_stat_instance_cit;
extern const struct config_item_type iscsi_stat_sess_err_cit;
extern const struct config_item_type iscsi_stat_tgt_attr_cit;
extern const struct config_item_type iscsi_stat_login_cit;
extern const struct config_item_type iscsi_stat_logout_cit;

/*
 * For struct iscsi_session->se_sess default groups
 */
extern const struct config_item_type iscsi_stat_sess_cit;

/* iSCSI session error types */
#define ISCSI_SESS_ERR_UNKNOWN          0
#define ISCSI_SESS_ERR_DIGEST           1
#define ISCSI_SESS_ERR_CXN_TIMEOUT      2
#define ISCSI_SESS_ERR_PDU_FORMAT       3

/* iSCSI session error stats */
struct iscsi_sess_err_stats {
        spinlock_t      lock;
        u32             digest_errors;
        u32             cxn_timeout_errors;
        u32             pdu_format_errors;
        u32             last_sess_failure_type;
        char            last_sess_fail_rem_name[ISCSI_IQN_LEN];
} ____cacheline_aligned;

/* iSCSI login failure types (sub oids) */
#define ISCSI_LOGIN_FAIL_OTHER          2
#define ISCSI_LOGIN_FAIL_REDIRECT       3
#define ISCSI_LOGIN_FAIL_AUTHORIZE      4
#define ISCSI_LOGIN_FAIL_AUTHENTICATE   5
#define ISCSI_LOGIN_FAIL_NEGOTIATE      6

/* iSCSI login stats */
struct iscsi_login_stats {
        spinlock_t      lock;
        u32             accepts;
        u32             other_fails;
        u32             redirects;
        u32             authorize_fails;
        u32             authenticate_fails;
        u32             negotiate_fails;        /* used for notifications */
        u64             last_fail_time;         /* time stamp (jiffies) */
        u32             last_fail_type;
        int             last_intr_fail_ip_family;
        struct sockaddr_storage last_intr_fail_sockaddr;
        char            last_intr_fail_name[ISCSI_IQN_LEN];
} ____cacheline_aligned;

/* iSCSI logout stats */
struct iscsi_logout_stats {
        spinlock_t      lock;
        u32             normal_logouts;
        u32             abnormal_logouts;
} ____cacheline_aligned;

#endif   /*** ISCSI_TARGET_STAT_H ***/