#include "fio.h"
#include "os.h"
+static LIST_HEAD(engine_list);
+
static int check_engine_ops(struct ioengine_ops *ops)
{
+ if (ops->version != FIO_IOOPS_VERSION) {
+ log_err("bad ioops version %d (want %d)\n", ops->version, FIO_IOOPS_VERSION);
+ return 1;
+ }
+
/*
* cpu thread doesn't need to provide anything
*/
return 0;
}
-struct ioengine_ops *load_ioengine(struct thread_data *td, char *name)
+void unregister_ioengine(struct ioengine_ops *ops)
{
- char engine[16], engine_lib[256];
- struct ioengine_ops *ops, *ret;
- void *dlhandle;
+ list_del(&ops->list);
+ INIT_LIST_HEAD(&ops->list);
+}
- strcpy(engine, name);
+int register_ioengine(struct ioengine_ops *ops)
+{
+ if (check_engine_ops(ops))
+ return 1;
+
+ INIT_LIST_HEAD(&ops->list);
+ list_add_tail(&ops->list, &engine_list);
+ return 0;
+}
+
+static struct ioengine_ops *find_ioengine(const char *name)
+{
+ struct ioengine_ops *ops;
+ struct list_head *entry;
+ char engine[16];
+
+ strncpy(engine, name, sizeof(engine) - 1);
- /*
- * linux libaio has alias names, so convert to what we want
- */
if (!strncmp(engine, "linuxaio", 8) || !strncmp(engine, "aio", 3))
strcpy(engine, "libaio");
- sprintf(engine_lib, "%s/lib/fio/fio-engine-%s.o", fio_inst_prefix, engine);
+ list_for_each(entry, &engine_list) {
+ ops = list_entry(entry, struct ioengine_ops, list);
+ if (!strcmp(engine, ops->name))
+ return ops;
+ }
+
+ return NULL;
+}
+
+static struct ioengine_ops *dlopen_ioengine(struct thread_data *td,
+ const char *engine_lib)
+{
+ struct ioengine_ops *ops;
+ void *dlhandle;
+
dlerror();
dlhandle = dlopen(engine_lib, RTLD_LAZY);
if (!dlhandle) {
return NULL;
}
+ /*
+ * Unlike the included modules, external engines should have a
+ * non-static ioengine structure that we can reference.
+ */
ops = dlsym(dlhandle, "ioengine");
if (!ops) {
td_vmsg(td, -1, dlerror());
return NULL;
}
- if (ops->version != FIO_IOOPS_VERSION) {
- log_err("bad ioops version %d (want %d)\n", ops->version, FIO_IOOPS_VERSION);
- dlclose(dlhandle);
+ ops->dlhandle = dlhandle;
+ return ops;
+}
+
+struct ioengine_ops *load_ioengine(struct thread_data *td, const char *name)
+{
+ struct ioengine_ops *ops, *ret;
+ char engine[16];
+
+ strncpy(engine, name, sizeof(engine) - 1);
+
+ /*
+ * linux libaio has alias names, so convert to what we want
+ */
+ if (!strncmp(engine, "linuxaio", 8) || !strncmp(engine, "aio", 3))
+ strcpy(engine, "libaio");
+
+ ops = find_ioengine(engine);
+ if (!ops)
+ ops = dlopen_ioengine(td, name);
+
+ if (!ops) {
+ log_err("fio: engine %s not loadable\n", name);
return NULL;
}
/*
* Check that the required methods are there.
*/
- if (check_engine_ops(ops)) {
- dlclose(dlhandle);
+ if (check_engine_ops(ops))
return NULL;
- }
ret = malloc(sizeof(*ret));
memcpy(ret, ops, sizeof(*ret));
ret->data = NULL;
- ret->dlhandle = dlhandle;
return ret;
}
if (td->io_ops->cleanup)
td->io_ops->cleanup(td);
- dlclose(td->io_ops->dlhandle);
+ if (td->io_ops->dlhandle)
+ dlclose(td->io_ops->dlhandle);
+
free(td->io_ops);
td->io_ops = NULL;
}
return 0;
}
-int td_io_sync(struct thread_data *td, struct fio_file *f)
-{
- if (td->io_ops->sync)
- return td->io_ops->sync(td, f);
-
- return 0;
-}
-
int td_io_getevents(struct thread_data *td, int min, int max,
struct timespec *t)
{
int td_io_queue(struct thread_data *td, struct io_u *io_u)
{
- gettimeofday(&io_u->issue_time, NULL);
+ fio_gettime(&io_u->issue_time, NULL);
return td->io_ops->queue(td, io_u);
}