#include <unistd.h>
#include <string.h>
#include <dlfcn.h>
+#include <assert.h>
+
#include "fio.h"
-#include "os.h"
-struct ioengine_ops *load_ioengine(struct thread_data *td, char *name)
+static LIST_HEAD(engine_list);
+
+static int check_engine_ops(struct ioengine_ops *ops)
{
- char engine[16], engine_lib[256];
- struct ioengine_ops *ops;
- void *dlhandle;
+ if (ops->version != FIO_IOOPS_VERSION) {
+ log_err("bad ioops version %d (want %d)\n", ops->version, FIO_IOOPS_VERSION);
+ return 1;
+ }
- strcpy(engine, name);
+ if (!ops->queue) {
+ log_err("%s: no queue handler\n", ops->name);
+ return 1;
+ }
/*
- * linux libaio has alias names, so convert to what we want
+ * sync engines only need a ->queue()
*/
- if (!strncmp(engine, "linuxaio", 8) || !strncmp(engine, "aio", 3))
- strcpy(engine, "libaio");
+ if (ops->flags & FIO_SYNCIO)
+ return 0;
+
+ if (!ops->event) {
+ log_err("%s: no event handler\n", ops->name);
+ return 1;
+ }
+ if (!ops->getevents) {
+ log_err("%s: no getevents handler\n", ops->name);
+ return 1;
+ }
+ if (!ops->queue) {
+ log_err("%s: no queue handler\n", ops->name);
+ return 1;
+ }
+
+ return 0;
+}
+
+void unregister_ioengine(struct ioengine_ops *ops)
+{
+ list_del(&ops->list);
+ INIT_LIST_HEAD(&ops->list);
+}
+
+void register_ioengine(struct ioengine_ops *ops)
+{
+ INIT_LIST_HEAD(&ops->list);
+ list_add_tail(&ops->list, &engine_list);
+}
+
+static struct ioengine_ops *find_ioengine(const char *name)
+{
+ struct ioengine_ops *ops;
+ struct list_head *entry;
+
+ list_for_each(entry, &engine_list) {
+ ops = list_entry(entry, struct ioengine_ops, list);
+ if (!strcmp(name, 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;
- sprintf(engine_lib, "/usr/local/lib/fio/fio-engine-%s.o", engine);
dlerror();
dlhandle = dlopen(engine_lib, RTLD_LAZY);
if (!dlhandle) {
- td_vmsg(td, -1, dlerror());
+ td_vmsg(td, -1, dlerror(), "dlopen");
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());
+ td_vmsg(td, -1, dlerror(), "dlsym");
dlclose(dlhandle);
return NULL;
}
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))
+ return NULL;
+
+ ret = malloc(sizeof(*ret));
+ memcpy(ret, ops, sizeof(*ret));
+ ret->data = NULL;
+
+ return ret;
+}
+
void close_ioengine(struct thread_data *td)
{
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;
+}
+
+int td_io_prep(struct thread_data *td, struct io_u *io_u)
+{
+ if (td->io_ops->prep)
+ return td->io_ops->prep(td, io_u);
+
+ return 0;
+}
+
+int td_io_getevents(struct thread_data *td, int min, int max,
+ struct timespec *t)
+{
+ if (min > 0 && td->io_ops->commit) {
+ int r = td->io_ops->commit(td);
+
+ if (r < 0)
+ return r;
+ }
+ if (td->io_ops->getevents)
+ return td->io_ops->getevents(td, min, max, t);
+
+ return 0;
+}
+
+int td_io_queue(struct thread_data *td, struct io_u *io_u)
+{
+ int ret;
+
+ assert((io_u->flags & IO_U_F_FLIGHT) == 0);
+ io_u->flags |= IO_U_F_FLIGHT;
+
+ assert(io_u->file->flags & FIO_FILE_OPEN);
+
+ io_u->error = 0;
+ io_u->resid = 0;
+
+ if (td->io_ops->flags & FIO_SYNCIO) {
+ fio_gettime(&io_u->issue_time, NULL);
+ memcpy(&td->last_issue, &io_u->issue_time, sizeof(struct timeval));
+
+ /*
+ * for a sync engine, set the timeout upfront
+ */
+ if (mtime_since(&td->timeout_end, &io_u->issue_time) < IO_U_TIMEOUT)
+ io_u_set_timeout(td);
+ }
+
+ if (io_u->ddir != DDIR_SYNC)
+ td->io_issues[io_u->ddir]++;
+
+ io_u_mark_depth(td, io_u);
+
+ ret = td->io_ops->queue(td, io_u);
+
+ if (ret == FIO_Q_QUEUED) {
+ int r;
+
+ td->io_u_queued++;
+ if (td->io_u_queued > td->o.iodepth_batch) {
+ r = td_io_commit(td);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ if ((td->io_ops->flags & FIO_SYNCIO) == 0) {
+ fio_gettime(&io_u->issue_time, NULL);
+ memcpy(&td->last_issue, &io_u->issue_time, sizeof(struct timeval));
+
+ /*
+ * async engine, set the timeout here
+ */
+ if (ret == FIO_Q_QUEUED &&
+ mtime_since(&td->timeout_end, &io_u->issue_time) < IO_U_TIMEOUT)
+ io_u_set_timeout(td);
+ }
+
+ return ret;
+}
+
+int td_io_init(struct thread_data *td)
+{
+ int ret = 0;
+
+ if (td->io_ops->init) {
+ ret = td->io_ops->init(td);
+ if (ret && td->o.iodepth > 1)
+ log_err("fio: io engine init failed. Perhaps try reducing io dpeth?\n");
+ }
+
+ return ret;
+}
+
+int td_io_commit(struct thread_data *td)
+{
+ if (!td->cur_depth)
+ return 0;
+
+ td->io_u_queued = 0;
+ if (td->io_ops->commit)
+ return td->io_ops->commit(td);
+
+ return 0;
+}
+
+int td_io_open_file(struct thread_data *td, struct fio_file *f)
+{
+ if (td->io_ops->open_file(td, f)) {
+ if (td->error == EINVAL && td->o.odirect)
+ log_err("fio: destination does not support O_DIRECT\n");
+ if (td->error == EMFILE)
+ log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
+
+ return 1;
+ }
+
+ if (f->filetype == FIO_TYPE_PIPE) {
+ if (td_random(td)) {
+ log_err("fio: can't seek on pipes (no random io)\n");
+ goto err;
+ }
+ }
+
+ f->last_free_lookup = 0;
+ f->last_completed_pos = 0;
+ f->last_pos = f->file_offset;
+ f->flags |= FIO_FILE_OPEN;
+ f->flags &= ~FIO_FILE_CLOSING;
+
+ if (td->io_ops->flags & FIO_DISKLESSIO)
+ goto done;
+
+ if (td->o.invalidate_cache && file_invalidate_cache(td, f))
+ goto err;
+
+ if (td->o.fadvise_hint &&
+ (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_FILE)) {
+
+ int flags;
+
+ if (td_random(td))
+ flags = POSIX_FADV_RANDOM;
+ else
+ flags = POSIX_FADV_SEQUENTIAL;
+
+ if (fadvise(f->fd, f->file_offset, f->io_size, flags) < 0) {
+ td_verror(td, errno, "fadvise");
+ goto err;
+ }
+ }
+
+ if (f->file_map)
+ memset(f->file_map, 0, f->num_maps * sizeof(long));
+
+done:
+ log_file(td, f, FIO_LOG_OPEN_FILE);
+ td->nr_open_files++;
+ get_file(f);
+ return 0;
+err:
+ if (td->io_ops->close_file)
+ td->io_ops->close_file(td, f);
+ return 1;
+}
+
+void td_io_close_file(struct thread_data *td, struct fio_file *f)
+{
+ if (!(f->flags & FIO_FILE_CLOSING))
+ log_file(td, f, FIO_LOG_CLOSE_FILE);
+
+ /*
+ * mark as closing, do real close when last io on it has completed
+ */
+ f->flags |= FIO_FILE_CLOSING;
+
+ put_file(td, f);
}
projects / fio.git / blobdiff