common.h

/*
 * DPVS is a software load balancer (Virtual Server) based on DPDK.
 *
 * Copyright (C) 2017 iQIYI (www.iqiyi.com).
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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.
 *
 */
#ifndef __DPVS_COMMON_H__
#define __DPVS_COMMON_H__
#include <stdbool.h>
#include <stdint.h>
#include <linux/if_ether.h>

#ifndef NELEMS
#define NELEMS(a)       (sizeof(a) / sizeof((a)[0]))
#endif

#ifndef max
#define max(a, b)       ((a) > (b) ? (a) : (b))
#endif

#ifndef __be32
typedef uint32_t    __be32;
#endif

#ifndef __be16
typedef uint16_t    __be16;
#endif

#define DPVS_MAX_SOCKET             2   /* num of NUMA socket */

typedef enum {
    DPVS_STATE_STOP = 1,
    DPVS_STATE_INIT,
    DPVS_STATE_NORMAL,
    DPVS_STATE_FINISH,
} dpvs_state_t;

void dpvs_state_set(dpvs_state_t stat);
dpvs_state_t dpvs_state_get(void);

bool is_power2(int num, int offset, int *lower);

enum {
    EDPVS_OK            = 0,
    EDPVS_INVAL         = -1,       /* invalid parameter */
    EDPVS_NOMEM         = -2,       /* no memory */
    EDPVS_EXIST         = -3,       /* already exist */
    EDPVS_NOTEXIST      = -4,       /* not exist */
    EDPVS_INVPKT        = -5,       /* invalid packet */
    EDPVS_DROP          = -6,       /* packet dropped */
    EDPVS_NOPROT        = -7,       /* no protocol */
    EDPVS_NOROUTE       = -8,       /* no route */
    EDPVS_DEFRAG        = -9,       /* defragment error */
    EDPVS_FRAG          = -10,      /* fragment error */
    EDPVS_DPDKAPIFAIL   = -11,      /* DPDK error */
    EDPVS_IDLE          = -12,      /* nothing to do */
    EDPVS_BUSY          = -13,      /* resource busy */
    EDPVS_NOTSUPP       = -14,      /* not support */
    EDPVS_RESOURCE      = -15,      /* no resource */
    EDPVS_OVERLOAD      = -16,      /* overloaded */
    EDPVS_NOSERV        = -17,      /* no service */
    EDPVS_DISABLED      = -18,      /* disabled */
    EDPVS_NOROOM        = -19,      /* no room */
    EDPVS_NONEALCORE    = -20,      /* non-eal thread lcore */
    EDPVS_CALLBACKFAIL  = -21,      /* callbacks fail */
    EDPVS_IO            = -22,      /* I/O error */
    EDPVS_MSG_FAIL      = -23,      /* msg callback failed */
    EDPVS_MSG_DROP      = -24,      /* msg callback dropped */
    EDPVS_PKTSTOLEN     = -25,      /* stolen packet */
    EDPVS_SYSCALL       = -26,      /* system call failed */
    EDPVS_NODEV         = -27,      /* no such device */

    /* positive code for non-error */
    EDPVS_KNICONTINUE   = 1,        /* KNI to continue */
    EDPVS_INPROGRESS    = 2,        /* in progress */
};

extern const char *dpvs_strerror(int err);

int linux_set_if_mac(const char *ifname, const unsigned char mac[ETH_ALEN]);
int linux_hw_mc_add(const char *ifname, const uint8_t hwma[ETH_ALEN]);
int linux_hw_mc_del(const char *ifname, const uint8_t hwma[ETH_ALEN]);

#endif /* __DPVS_COMMON_H__ */