/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef _INET_SCTP_SCTP_STACK_H
#define _INET_SCTP_SCTP_STACK_H

#include <sys/netstack.h>
#include <sys/taskq.h>

#ifdef  __cplusplus
extern "C" {
#endif

/* SCTP kstat */
typedef struct sctp_kstat_s {
        kstat_named_t   sctp_add_faddr;
        kstat_named_t   sctp_add_timer;
        kstat_named_t   sctp_conn_create;
        kstat_named_t   sctp_find_next_tq;
        kstat_named_t   sctp_fr_add_hdr;
        kstat_named_t   sctp_fr_not_found;
        kstat_named_t   sctp_output_failed;
        kstat_named_t   sctp_rexmit_failed;
        kstat_named_t   sctp_send_init_failed;
        kstat_named_t   sctp_send_cookie_failed;
        kstat_named_t   sctp_send_cookie_ack_failed;
        kstat_named_t   sctp_send_err_failed;
        kstat_named_t   sctp_send_sack_failed;
        kstat_named_t   sctp_send_shutdown_failed;
        kstat_named_t   sctp_send_shutdown_ack_failed;
        kstat_named_t   sctp_send_shutdown_comp_failed;
        kstat_named_t   sctp_send_user_abort_failed;
        kstat_named_t   sctp_send_asconf_failed;
        kstat_named_t   sctp_send_asconf_ack_failed;
        kstat_named_t   sctp_send_ftsn_failed;
        kstat_named_t   sctp_send_hb_failed;
        kstat_named_t   sctp_return_hb_failed;
        kstat_named_t   sctp_ss_rexmit_failed;
        kstat_named_t   sctp_cl_connect;
        kstat_named_t   sctp_cl_assoc_change;
        kstat_named_t   sctp_cl_check_addrs;
        kstat_named_t   sctp_reclaim_cnt;
        kstat_named_t   sctp_listen_cnt_drop;
} sctp_kstat_t;

/*
 * This struct contains only the counter part of sctp_kstat_t.  It is used
 * in sctp_stats_cpu_t instead of sctp_kstat_t to save memory space.
 */
typedef struct sctp_kstat_counter_s {
        uint64_t        sctp_add_faddr;
        uint64_t        sctp_add_timer;
        uint64_t        sctp_conn_create;
        uint64_t        sctp_find_next_tq;
        uint64_t        sctp_fr_add_hdr;
        uint64_t        sctp_fr_not_found;
        uint64_t        sctp_output_failed;
        uint64_t        sctp_rexmit_failed;
        uint64_t        sctp_send_init_failed;
        uint64_t        sctp_send_cookie_failed;
        uint64_t        sctp_send_cookie_ack_failed;
        uint64_t        sctp_send_err_failed;
        uint64_t        sctp_send_sack_failed;
        uint64_t        sctp_send_shutdown_failed;
        uint64_t        sctp_send_shutdown_ack_failed;
        uint64_t        sctp_send_shutdown_comp_failed;
        uint64_t        sctp_send_user_abort_failed;
        uint64_t        sctp_send_asconf_failed;
        uint64_t        sctp_send_asconf_ack_failed;
        uint64_t        sctp_send_ftsn_failed;
        uint64_t        sctp_send_hb_failed;
        uint64_t        sctp_return_hb_failed;
        uint64_t        sctp_ss_rexmit_failed;
        uint64_t        sctp_cl_connect;
        uint64_t        sctp_cl_assoc_change;
        uint64_t        sctp_cl_check_addrs;
        uint64_t        sctp_reclaim_cnt;
        uint64_t        sctp_listen_cnt_drop;
} sctp_kstat_counter_t;

/* Per CPU SCTP statistics counters. */
typedef struct {
        int64_t                 sctp_sc_assoc_cnt;
        mib2_sctp_t             sctp_sc_mib;
        sctp_kstat_counter_t    sctp_sc_stats;
} sctp_stats_cpu_t;

#define SCTP_KSTAT(sctps, x)            \
        ((sctps)->sctps_sc[CPU->cpu_seqid]->sctp_sc_stats.x++)

#define SCTPS_BUMP_MIB(sctps, x)        \
        BUMP_MIB(&(sctps)->sctps_sc[CPU->cpu_seqid]->sctp_sc_mib, x)

#define SCTPS_UPDATE_MIB(sctps, x, y)   \
        UPDATE_MIB(&(sctps)->sctps_sc[CPU->cpu_seqid]->sctp_sc_mib, x, y)

/*
 * SCTP stack instances
 */
struct sctp_stack {
        netstack_t      *sctps_netstack;        /* Common netstack */

        /* Protected by sctps_g_lock */
        struct list     sctps_g_list;   /* SCTP instance data chain */
        kmutex_t        sctps_g_lock;

#define SCTP_NUM_EPRIV_PORTS    64
        int             sctps_g_num_epriv_ports;
        in_port_t       sctps_g_epriv_ports[SCTP_NUM_EPRIV_PORTS];
        kmutex_t        sctps_epriv_port_lock;
        uint_t          sctps_next_port_to_try;

        /* SCTP bind hash list - all sctp_t with state >= BOUND. */
        struct sctp_tf_s        *sctps_bind_fanout;
        /* SCTP listen hash list - all sctp_t with state == LISTEN. */
        struct sctp_tf_s        *sctps_listen_fanout;
        struct sctp_tf_s        *sctps_conn_fanout;
        uint_t                  sctps_conn_hash_size;

        /* holds sctp tunables */
        struct mod_prop_info_s  *sctps_propinfo_tbl;

        /*
         * This lock protects the SCTP recvq_tq_list array and
         * recvq_tq_list_cur_sz.
         */
        kmutex_t                sctps_rq_tq_lock;
        int                     sctps_recvq_tq_list_max_sz;
        taskq_t                 **sctps_recvq_tq_list;

        /* Current number of recvq taskq.  At least 1 for the default taskq. */
        uint32_t                sctps_recvq_tq_list_cur_sz;
        uint32_t                sctps_recvq_tq_list_cur;

        /* Global list of SCTP ILLs */
        struct sctp_ill_hash_s  *sctps_g_ills;
        uint32_t                sctps_ills_count;
        krwlock_t               sctps_g_ills_lock;

        /* Global list of SCTP IPIFs */
        struct sctp_ipif_hash_s *sctps_g_ipifs;
        uint32_t                sctps_g_ipifs_count;
        krwlock_t               sctps_g_ipifs_lock;

        /* kstat exporting mib2_sctp_t and sctp_kstat_t data */
        kstat_t                 *sctps_mibkp;
        kstat_t                 *sctps_kstat;

        /* Variables for handling kmem reclaim call back. */
        kmutex_t        sctps_reclaim_lock;
        boolean_t       sctps_reclaim;
        timeout_id_t    sctps_reclaim_tid;
        uint32_t        sctps_reclaim_period;

        /* Listener association limit configuration. */
        kmutex_t        sctps_listener_conf_lock;
        list_t          sctps_listener_conf;

        /*
         * Per CPU stats
         *
         * sctps_sc: array of pointer to per CPU stats.  The i-th element in
         *   the array represents the stats of the CPU with cpu_seqid.
         * sctps_sc_cnt: number of CPU stats in the sctps_sc array.
         */
        sctp_stats_cpu_t        **sctps_sc;
        int                     sctps_sc_cnt;
};

typedef struct sctp_stack sctp_stack_t;

#ifdef  __cplusplus
}
#endif

#endif  /* _INET_SCTP_SCTP_STACK_H */