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/*
* array-info - Array Controllers Informations
* Copyright (C) 2002 Benoit Gaussen (ben@trez42.net)
* Copyright (c) 2009 Google, Inc (ragnark@google.com)
*
* $Log: array_plugin.c,v $
* Revision 1.5 2009/09/18 17:40:22 ragnark
* Add information about spare disks for cciss plugin
* Make array-info exit with exit code 1 if it detects problems with any of the logical volumes.
*
* Revision 1.4 2007/02/01 14:43:26 pere
* Rewrite plugin API to pass driver data between the functions.
*
* Revision 1.3 2007/01/31 13:32:29 pere
* Remove the need to link libarray-info into plugins by providing the functions needed in a list of callbacks.
*
* Revision 1.2 2002/07/30 14:12:46 trez42
* Functions add and show infos
*
* Revision 1.1 2002/07/29 16:49:10 trez42
* Add plugin support
* Change directory structure
*
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <dlfcn.h>
#include "array_plugin.h"
void
array_add_plugin(array_plugin_list_t ** list, array_plugin_t * plugin,
void *so_handle, char *so_path)
{
array_plugin_list_t *new;
new = malloc(sizeof (array_plugin_list_t));
new->plugin = plugin;
new->plugin_path = so_path;
new->plugin_handle = so_handle;
new->next = *list;
*list = new;
}
int
array_plugin_register(array_plugin_list_t ** plugin_list, char *so_path)
{
array_plugin_t *plugin;
void *so_handle;
if ((so_handle = dlopen(so_path, RTLD_NOW)) == NULL) {
printf("dlopen error: %s\n", dlerror());
return -1;
}
if ((plugin = dlsym(so_handle, "array_plugin")) == NULL) {
printf("dlsym error: %s\n", dlerror());
return -1;
}
if (VERSION_MAJOR(plugin->array_info_version) <
ARRAY_INFO_VERSION_MAJOR) {
printf("%s: wrong version (compiled for %d.%d.%d)\n", so_path,
VERSION_MAJOR(plugin->array_info_version),
VERSION_MINOR(plugin->array_info_version),
VERSION_PATCH(plugin->array_info_version));
return -1;
}
array_add_plugin(plugin_list, plugin, so_handle, so_path);
return 0;
}
array_plugin_list_t *
array_load_plugins(char *so_path)
{
DIR *so_dir;
struct dirent *dir_ent;
array_plugin_list_t *plugin_list = NULL;
if ((so_dir = opendir(so_path)) == NULL) {
perror("array_plugin_open");
return NULL;
}
while ((dir_ent = readdir(so_dir))) {
char *path;
struct stat sbuf;
if (strcasecmp
(dir_ent->d_name + strlen(dir_ent->d_name) - 3, ".so"))
continue;
path = malloc(strlen(so_path) + strlen(dir_ent->d_name) + 2);
strcpy(path, so_path);
strcat(path, "/");
strcat(path, dir_ent->d_name);
if (stat(path, &sbuf) == -1) {
perror("array_plugin_open");
return NULL;
}
if (!S_ISREG(sbuf.st_mode)) {
free(path);
continue;
}
array_plugin_register(&plugin_list, path);
}
closedir(so_dir);
return plugin_list;
}
void
array_close_plugins(array_plugin_list_t * plugin_list)
{
array_plugin_list_t *prev;
while (plugin_list) {
prev = plugin_list;
dlclose(plugin_list->plugin_handle);
plugin_list = plugin_list->next;
free(prev);
}
}
void
array_show_plugins(array_plugin_list_t * plugin_list)
{
while (plugin_list) {
printf("%s : %s\n", plugin_list->plugin_path,
plugin_list->plugin->plugin_description());
plugin_list = plugin_list->next;
}
}
array_plugin_t *
find_plugin(array_plugin_list_t * plugin_list, array_data_t * array_data)
{
int i;
while (plugin_list) {
for (i = 0; plugin_list->plugin->device_majors[i].type; i++)
if (plugin_list->plugin->device_majors[i].type ==
array_data->device_major.type
&& plugin_list->plugin->device_majors[i].major ==
array_data->device_major.major
&& (plugin_list->plugin->device_majors[i].minor ==
-1
|| plugin_list->plugin->device_majors[i].
minor == array_data->device_major.minor))
return plugin_list->plugin;
plugin_list = plugin_list->next;
}
return NULL;
}
int
array_dispatch(array_plugin_list_t * plugin_list, array_data_t * array_data)
{
array_plugin_t *plugin;
array_infos_t *info;
array_plugin_callbacks_t callbacks;
int errors=0;
if (!(plugin = find_plugin(plugin_list, array_data)))
return -1;
callbacks.array_add_infos = &array_add_infos;
plugin->driver_data = plugin->ctrl_open(array_data);
plugin->ctrl_req(plugin->driver_data);
info = plugin->ctrl_infos(plugin->driver_data, &callbacks, &errors);
array_show_infos(info, array_data->dump_flags);
plugin->ctrl_free(plugin->driver_data);
plugin->ctrl_close(plugin->driver_data);
return errors;
}
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