Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "proxyconfigwrite.h"

​

#include "zbxdbwrap.h"

#include "zbxdbhigh.h"

#include "zbxcommshigh.h"

#include "zbxrtc.h"

#include "zbx_host_constants.h"

#include "zbxalgo.h"

#include "zbxcacheconfig.h"

#include "zbxdb.h"

#include "zbxdbschema.h"

#include "zbxjson.h"

#include "zbxnum.h"

#include "zbxstr.h"

​

/*

 * The configuration sync is split into 4 parts for each table:

 * 1) proxyconfig_prepare_rows()

 *    Renames rename_field to '#'||rename_field for all rows to be updated. It's done to avoid

 *    possible conflicts when two field values used in unique index are swapped.

 *    Resets reset_field to null for all rows to be deleted or updated. It's done to avoid

 *    possible foreign key violation when rows in self referencing table are updated or deleted.

 *    The changed fields are marked as updated, so during update processing the correct values

 *    will be assigned to them.

 *

 * 2) proxyconfig_delete_rows()

 *    Deletes all existing rows within scope that are not present in received table data. The scope

 *    is limited to received hosts when partial updates are done.

 *

 * 3) proxyconfig_insert_rows()

 *    Inserts new rows that were not present in database.

 *

 * 4) proxyconfig_update_rows()

 *    Update changed fields.

 *

 * When processing related tables (for example drules, dchecks) the prepare and delete operations are

 * done from child tables to master tables. The insert and update operations are done from master

 * tables to child tables. This is done to avoid child rows being removed with cascaded deletes and

 * have parent rows updated/inserted when updating/inserting child rows.

 *

 */

​

typedef struct

{

    const zbx_db_field_t    *field;

}

zbx_const_field_ptr_t;

​

ZBX_VECTOR_DECL(const_field, zbx_const_field_ptr_t)

ZBX_VECTOR_IMPL(const_field, zbx_const_field_ptr_t)

​

/*

 * 128 bit flags to support update flags for host_invetory table which has more that 64 columns

 */

typedef struct

{

    zbx_uint64_t    blocks[128 / 64];

}

zbx_flags128_t;

​

static void zbx_flags128_set(zbx_flags128_t *flags, int bit)

{

    flags->blocks[bit >> 6] |= (__UINT64_C(1) << (bit & 0x3f));

}

​

static void zbx_flags128_clear(zbx_flags128_t *flags, int bit)

{

    flags->blocks[bit >> 6] &= ~(__UINT64_C(1) << (bit & 0x3f));

}

​

static void zbx_flags128_init(zbx_flags128_t *flags)

{

    memset(flags->blocks, 0, sizeof(zbx_uint64_t) * (128 / 64));

}

​

static int  zbx_flags128_isset(zbx_flags128_t *flags, int bit)

{