suricata/src/tm-threads.h

/* Copyright (C) 2007-2010 Open Information Security Foundation
 *
 * You can copy, redistribute or modify this Program under the terms of
 * the GNU General Public License version 2 as published by the Free
 * Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

/**
 * \file
 *
 * \author Victor Julien <victor@inliniac.net>
 * \author Anoop Saldanha <poonaatsoc@gmail.com>
 */

#ifndef __TM_THREADS_H__
#define __TM_THREADS_H__

#include "tm-modules.h"

/* ThreadVars type */
enum {
    TVT_PPT,
    TVT_MGMT,
    TVT_MAX,
};

typedef struct TmSlot_ {
    /* function pointers */
    TmEcode (*SlotFunc)(ThreadVars *, Packet *, void *, PacketQueue *,
                        PacketQueue *);

    TmEcode (*PktAcqLoop)(ThreadVars *, void *, void *);

    TmEcode (*SlotThreadInit)(ThreadVars *, void *, void **);
    void (*SlotThreadExitPrintStats)(ThreadVars *, void *);
    TmEcode (*SlotThreadDeinit)(ThreadVars *, void *);

    /* data storage */
    void *slot_initdata;
    void *slot_data;

    /* queue filled by the SlotFunc with packets that will
     * be processed futher _before_ the current packet.
     * The locks in the queue are NOT used */
    PacketQueue slot_pre_pq;

    /* queue filled by the SlotFunc with packets that will
     * be processed futher _after_ the current packet. The
     * locks in the queue are NOT used */
    PacketQueue slot_post_pq;

    /* slot id, only used my TmVarSlot to know what the first slot is */
    int id;

    /* linked list, only used when you have multiple slots(used by TmVarSlot) */
    struct TmSlot_ *slot_next;
} TmSlot;

extern ThreadVars *tv_root[TVT_MAX];

extern SCMutex tv_root_lock;

void TmSlotSetFuncAppend(ThreadVars *, TmModule *, void *);

ThreadVars *TmThreadCreate(char *, char *, char *, char *, char *, char *,
                           void *(fn_p)(void *), int);
ThreadVars *TmThreadCreatePacketHandler(char *, char *, char *, char *, char *,
                                        char *);
ThreadVars *TmThreadCreateMgmtThread(char *name, void *(fn_p)(void *), int);
TmEcode TmThreadSpawn(ThreadVars *);
void TmThreadSetFlags(ThreadVars *, uint8_t);
void TmThreadSetAOF(ThreadVars *, uint8_t);
void TmThreadKillThread(ThreadVars *);
void TmThreadKillThreads(void);
void TmThreadAppend(ThreadVars *, int);
void TmThreadRemove(ThreadVars *, int);

TmEcode TmThreadsSlotProcessPkt(ThreadVars *, TmSlot *, Packet *);

TmEcode TmThreadSetCPUAffinity(ThreadVars *, uint16_t);
TmEcode TmThreadSetThreadPriority(ThreadVars *, int);
TmEcode TmThreadSetCPU(ThreadVars *, uint8_t);
TmEcode TmThreadSetupOptions(ThreadVars *);
void TmThreadSetPrio(ThreadVars *);
int TmThreadGetNbThreads(uint8_t type);

void TmThreadInitMC(ThreadVars *);
void TmThreadTestThreadUnPaused(ThreadVars *);
void TmThreadContinue(ThreadVars *);
void TmThreadContinueThreads(void);
void TmThreadPause(ThreadVars *);
void TmThreadPauseThreads(void);
void TmThreadCheckThreadState(void);
TmEcode TmThreadWaitOnThreadInit(void);
ThreadVars *TmThreadsGetCallingThread(void);

int TmThreadsCheckFlag(ThreadVars *, uint8_t);
void TmThreadsSetFlag(ThreadVars *, uint8_t);
void TmThreadsUnsetFlag(ThreadVars *, uint8_t);

TmEcode TmThreadsSlotVarRun (ThreadVars *tv, Packet *p, TmSlot *slot);

/**
 *  \brief Process the rest of the functions (if any) and queue.
 */
#define TmThreadsSlotProcessPkt(tv, s, p) ({                                    \
    TmEcode r = TM_ECODE_OK;                                                    \
                                                                                \
    if ((s) != NULL &&                                                          \
            TmThreadsSlotVarRun((tv), (p), (s)) == TM_ECODE_FAILED) {           \
        TmqhOutputPacketpool((tv), (p));                                        \
        TmThreadsSetFlag((tv), THV_FAILED);                                     \
        r = TM_ECODE_FAILED;                                                    \
    } else {                                                                    \
        tv->tmqh_out(tv, p);                                                    \
    }                                                                           \
                                                                                \
    r;                                                                          \
})

#endif /* __TM_THREADS_H__ */