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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 ((PCILIB_VERSION_GET_MAJOR(model_info->interface_version) != PCILIB_VERSION_MAJOR)||(PCILIB_VERSION_GET_MINOR(model_info->interface_version) != PCILIB_VERSION_MINOR)) {
- printf("%u %u\n", model_info->interface_version, PCILIB_EVENT_INTERFACE_VERSION);
- pcilib_warning("Plugin %s exposes outdated interface version (%u.%u.%u), pcilib interface version is (%u.%u.%u)", model_info->name,
- PCILIB_VERSION_GET_MAJOR(model_info->interface_version),
- PCILIB_VERSION_GET_MINOR(model_info->interface_version),
- PCILIB_VERSION_GET_MICRO(model_info->interface_version),
- PCILIB_VERSION_GET_MAJOR(PCILIB_EVENT_INTERFACE_VERSION),
- PCILIB_VERSION_GET_MINOR(PCILIB_EVENT_INTERFACE_VERSION),
- PCILIB_VERSION_GET_MICRO(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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