/*

 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2015, 2015 SAP SE. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "libodm_aix.hpp"

#include "misc_aix.hpp"

#include <stdlib.h>

#include <dlfcn.h>

#include <string.h>

#include "runtime/arguments.hpp"

dynamicOdm::dynamicOdm() {

  const char *libodmname = "/usr/lib/libodm.a(shr_64.o)";

  _libhandle = dlopen(libodmname, RTLD_MEMBER | RTLD_NOW);

  if (!_libhandle) {

    trcVerbose("Couldn't open %s", libodmname);

    return;

  }

  _odm_initialize  = (fun_odm_initialize )dlsym(_libhandle, "odm_initialize" );

  _odm_set_path    = (fun_odm_set_path   )dlsym(_libhandle, "odm_set_path"   );

  _odm_mount_class = (fun_odm_mount_class)dlsym(_libhandle, "odm_mount_class");

  _odm_get_obj     = (fun_odm_get_obj    )dlsym(_libhandle, "odm_get_obj"    );

  _odm_terminate   = (fun_odm_terminate  )dlsym(_libhandle, "odm_terminate"  );

  if (!_odm_initialize || !_odm_set_path || !_odm_mount_class || !_odm_get_obj || !_odm_terminate) {

    trcVerbose("Couldn't find all required odm symbols from %s", libodmname);

    dlclose(_libhandle);

    _libhandle = NULL;

    return;

  }

}

dynamicOdm::~dynamicOdm() {

  if (_libhandle) { dlclose(_libhandle); }

}

void odmWrapper::clean_data() { if (_data) { free(_data); _data = NULL; } }

int odmWrapper::class_offset(char *field, bool is_aix_5)

{

  assert(has_class(), "initialization");

  for (int i = 0; i < odm_class()->nelem; i++) {

    if (strcmp(odm_class()->elem[i].elemname, field) == 0) {

      int offset = odm_class()->elem[i].offset;

      if (is_aix_5) { offset += LINK_VAL_OFFSET; }

      return offset;

    }

  }

  return -1;

}

void odmWrapper::determine_os_kernel_version(uint32_t* p_ver) {

  int major_aix_version = ((*p_ver) >> 24) & 0xFF,

      minor_aix_version = ((*p_ver) >> 16) & 0xFF;

  assert(*p_ver, "must be initialized");

  odmWrapper odm("product", "/usr/lib/objrepos"); // could also use "lpp"

  if (!odm.has_class()) {

    trcVerbose("try_determine_os_kernel_version: odm init problem");

    return;

  }

  int voff, roff, moff, foff;

  bool is_aix_5 = (major_aix_version == 5);

  voff = odm.class_offset("ver", is_aix_5);

  roff = odm.class_offset("rel", is_aix_5);

  moff = odm.class_offset("mod", is_aix_5);

  foff = odm.class_offset("fix", is_aix_5);

  if (voff == -1 || roff == -1 || moff == -1 || foff == -1) {

    trcVerbose("try_determine_os_kernel_version: could not get offsets");

    return;

  }

  if (!odm.retrieve_obj("name='bos.mp64'")) {

    trcVerbose("try_determine_os_kernel_version: odm_get_obj failed");

    return;

  }

  int version, release, modification, fix_level;

  do {

    version      = odm.read_short(voff);

    release      = odm.read_short(roff);

    modification = odm.read_short(moff);

    fix_level    = odm.read_short(foff);

    trcVerbose("odm found version: %d.%d.%d.%d", version, release, modification, fix_level);

    if (version >> 8 != 0 || release >> 8 != 0 || modification >> 8 != 0 || fix_level >> 8 != 0) {

      trcVerbose("8 bit numbers expected");

      return;

    }

  } while (odm.retrieve_obj());

  if (version != major_aix_version || release != minor_aix_version) {

    trcVerbose("version determined by odm does not match uname");

    return;

  }

  *p_ver = version << 24 | release << 16 | modification << 8 | fix_level;

}