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#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <dirent.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include "model.h"
#include "error.h"
#include "pci.h"
#include "config.h"
void *pcilib_plugin_load(const char *name) {
void *plug;
char *fullname;
const char *path;
path = getenv("PCILIB_PLUGIN_DIR");
if (!path) path = PCILIB_PLUGIN_DIR;
fullname = malloc(strlen(path) + strlen(name) + 2);
if (!fullname) return NULL;
sprintf(fullname, "%s/%s", path, name);
plug = dlopen(fullname, RTLD_LAZY|RTLD_LOCAL);
free(fullname);
return plug;
}
void pcilib_plugin_close(void *plug) {
if (plug)
dlclose(plug);
}
void *pcilib_plugin_get_symbol(void *plug, const char *symbol) {
if ((!plug)||(!symbol)) return NULL;
return dlsym(plug, symbol);
}
const pcilib_model_description_t *pcilib_get_plugin_model(pcilib_t *pcilib, void *plug, unsigned short vendor_id, unsigned short device_id, const char *model) {
void *get_model;
const pcilib_model_description_t *model_info;
if (!plug) return NULL;
get_model = dlsym(plug, "pcilib_get_event_model");
if (!get_model) return NULL;
model_info = ((const pcilib_model_description_t *(*)(pcilib_t *pcilib, unsigned short vendor_id, unsigned short device_id, const char *model))get_model)(pcilib, vendor_id, device_id, model);
if (!model_info) return model_info;
if (model_info->interface_version != PCILIB_EVENT_INTERFACE_VERSION) {
pcilib_warning("Plugin %s exposes outdated interface version (%lu), pcitool supports (%lu)", model_info->name, model_info->interface_version, PCILIB_EVENT_INTERFACE_VERSION);
return NULL;
}
return model_info;
}
const pcilib_model_description_t *pcilib_find_plugin_model(pcilib_t *pcilib, unsigned short vendor_id, unsigned short device_id, const char *model) {
DIR *dir;
const char *path;
struct dirent *entry;
void *plugin;
const pcilib_model_description_t *model_info = NULL;
path = getenv("PCILIB_PLUGIN_DIR");
if (!path) path = PCILIB_PLUGIN_DIR;
if (model) {
plugin = pcilib_plugin_load(model);
if (plugin) {
model_info = pcilib_get_plugin_model(pcilib, plugin, vendor_id, device_id, model);
if (model_info) {
pcilib->event_plugin = plugin;
return model_info;
}
pcilib_plugin_close(plugin);
}
}
dir = opendir(path);
if (!dir) return NULL;
while ((entry = readdir(dir))) {
const char *suffix = strstr(entry->d_name, ".so");
if ((!suffix)||(strlen(suffix) != 3)) continue;
if ((model)&&(!strcmp(entry->d_name, model)))
continue;
plugin = pcilib_plugin_load(entry->d_name);
if (plugin) {
model_info = pcilib_get_plugin_model(pcilib, plugin, vendor_id, device_id, model);
if (model_info) {
pcilib->event_plugin = plugin;
break;
}
pcilib_plugin_close(plugin);
}
}
closedir(dir);
return model_info;
}
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