2 * The io parts of the fio tool, includes workers for sync and mmap'ed
3 * io, as well as both posix and linux libaio support.
5 * sync io is implemented on top of aio.
7 * This is not really specific to fio, if the get_io_u/put_io_u and
8 * structures was pulled into this as well it would be a perfectly
9 * generic io engine that could be used for other projects.
20 struct ioengine_ops *load_ioengine(struct thread_data *td, char *name)
22 char engine[16], engine_lib[256];
23 struct ioengine_ops *ops;
29 * linux libaio has alias names, so convert to what we want
31 if (!strncmp(engine, "linuxaio", 8) || !strncmp(engine, "aio", 3))
32 strcpy(engine, "libaio");
34 sprintf(engine_lib, "%s/lib/fio/fio-engine-%s.o", fio_inst_prefix, engine);
36 dlhandle = dlopen(engine_lib, RTLD_LAZY);
38 td_vmsg(td, -1, dlerror());
42 ops = dlsym(dlhandle, "ioengine");
44 td_vmsg(td, -1, dlerror());
49 if (ops->version != FIO_IOOPS_VERSION) {
50 log_err("bad ioops version %d (want %d)\n", ops->version, FIO_IOOPS_VERSION);
55 ops->dlhandle = dlhandle;
59 void close_ioengine(struct thread_data *td)
61 if (td->io_ops->cleanup)
62 td->io_ops->cleanup(td);
64 dlclose(td->io_ops->dlhandle);