#include "gfapi.h"
struct fio_option gfapi_options[] = {
- {
- .name = "volume",
- .lname = "Glusterfs volume",
- .type = FIO_OPT_STR_STORE,
- .help = "Name of the Glusterfs volume",
- .off1 = offsetof(struct gf_options, gf_vol),
- .category = FIO_OPT_C_ENGINE,
- .group = FIO_OPT_G_GFAPI,
- },
- {
- .name = "brick",
- .lname = "Glusterfs brick name",
- .type = FIO_OPT_STR_STORE,
- .help = "Name of the Glusterfs brick to connect",
- .off1 = offsetof(struct gf_options, gf_brick),
- .category = FIO_OPT_C_ENGINE,
- .group = FIO_OPT_G_GFAPI,
- },
- {
- .name = NULL,
- },
+ {
+ .name = "volume",
+ .lname = "Glusterfs volume",
+ .type = FIO_OPT_STR_STORE,
+ .help = "Name of the Glusterfs volume",
+ .off1 = offsetof(struct gf_options, gf_vol),
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_GFAPI,
+ },
+ {
+ .name = "brick",
+ .lname = "Glusterfs brick name",
+ .type = FIO_OPT_STR_STORE,
+ .help = "Name of the Glusterfs brick to connect",
+ .off1 = offsetof(struct gf_options, gf_brick),
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_GFAPI,
+ },
+ {
+ .name = NULL,
+ },
};
int fio_gf_setup(struct thread_data *td)
int r = 0;
struct gf_data *g = NULL;
struct gf_options *opt = td->eo;
- struct stat sb = {0, };
+ struct stat sb = { 0, };
dprint(FD_IO, "fio setup\n");
if (td->io_ops->data)
- return 0;
+ return 0;
g = malloc(sizeof(struct gf_data));
- if (!g){
- log_err("malloc failed.\n");
- return -ENOMEM;
+ if (!g) {
+ log_err("malloc failed.\n");
+ return -ENOMEM;
}
- g->fs = NULL; g->fd = NULL; g->aio_events = NULL;
-
- g->fs = glfs_new (opt->gf_vol);
- if (!g->fs){
- log_err("glfs_new failed.\n");
- goto cleanup;
+ g->fs = NULL;
+ g->fd = NULL;
+ g->aio_events = NULL;
+
+ g->fs = glfs_new(opt->gf_vol);
+ if (!g->fs) {
+ log_err("glfs_new failed.\n");
+ goto cleanup;
}
- glfs_set_logging (g->fs, "/tmp/fio_gfapi.log", 7);
+ glfs_set_logging(g->fs, "/tmp/fio_gfapi.log", 7);
/* default to tcp */
r = glfs_set_volfile_server(g->fs, "tcp", opt->gf_brick, 0);
- if (r){
- log_err("glfs_set_volfile_server failed.\n");
- goto cleanup;
+ if (r) {
+ log_err("glfs_set_volfile_server failed.\n");
+ goto cleanup;
}
r = glfs_init(g->fs);
- if (r){
- log_err("glfs_init failed. Is glusterd running on brick?\n");
- goto cleanup;
+ if (r) {
+ log_err("glfs_init failed. Is glusterd running on brick?\n");
+ goto cleanup;
}
sleep(2);
- r = glfs_lstat (g->fs, ".", &sb);
- if (r){
- log_err("glfs_lstat failed.\n");
- goto cleanup;
+ r = glfs_lstat(g->fs, ".", &sb);
+ if (r) {
+ log_err("glfs_lstat failed.\n");
+ goto cleanup;
}
dprint(FD_FILE, "fio setup %p\n", g->fs);
td->io_ops->data = g;
cleanup:
- if (r){
- if (g){
- if (g->fs){
- glfs_fini(g->fs);
- }
- free(g);
- td->io_ops->data = NULL;
- }
+ if (r) {
+ if (g) {
+ if (g->fs) {
+ glfs_fini(g->fs);
+ }
+ free(g);
+ td->io_ops->data = NULL;
+ }
}
return r;
}
struct gf_data *g = td->io_ops->data;
if (g) {
- if (g->aio_events)
- free(g->aio_events);
- if (g->fd)
- glfs_close(g->fd);
- if (g->fs)
- glfs_fini(g->fs);
- free(g);
- td->io_ops->data = NULL;
+ if (g->aio_events)
+ free(g->aio_events);
+ if (g->fd)
+ glfs_close(g->fd);
+ if (g->fs)
+ glfs_fini(g->fs);
+ free(g);
+ td->io_ops->data = NULL;
}
}
int fio_gf_get_file_size(struct thread_data *td, struct fio_file *f)
{
- struct stat buf;
- int ret;
- struct gf_data *g = td->io_ops->data;
+ struct stat buf;
+ int ret;
+ struct gf_data *g = td->io_ops->data;
- dprint(FD_FILE, "get file size %s\n", f->file_name);
+ dprint(FD_FILE, "get file size %s\n", f->file_name);
- if (!g || !g->fs)
- {
- return 0;
- }
- if (fio_file_size_known(f))
- return 0;
+ if (!g || !g->fs) {
+ return 0;
+ }
+ if (fio_file_size_known(f))
+ return 0;
- ret = glfs_lstat (g->fs, f->file_name, &buf);
- if (ret < 0){
- log_err("glfs_lstat failed.\n");
- return ret;
- }
+ ret = glfs_lstat(g->fs, f->file_name, &buf);
+ if (ret < 0) {
+ log_err("glfs_lstat failed.\n");
+ return ret;
+ }
- f->real_file_size = buf.st_size;
- fio_file_set_size_known(f);
+ f->real_file_size = buf.st_size;
+ fio_file_set_size_known(f);
- return 0;
+ return 0;
}
int fio_gf_open_file(struct thread_data *td, struct fio_file *f)
{
- int flags = 0;
- int ret = 0;
- struct gf_data *g = td->io_ops->data;
- struct stat sb = {0, };
-
- if (td_write(td)) {
- if (!read_only)
- flags = O_RDWR;
- } else if (td_read(td)) {
- if (!read_only)
- flags = O_RDWR;
- else
- flags = O_RDONLY;
- }
- dprint(FD_FILE, "fio file %s open mode %s td rw %s\n", f->file_name,
- flags == O_RDONLY? "ro":"rw", td_read(td)? "read":"write");
- g->fd = glfs_creat(g->fs, f->file_name, flags, 0644);
- if (!g->fd){
- log_err("glfs_creat failed.\n");
- ret = errno;
- }
- /* file for read doesn't exist or shorter than required, create/extend it */
- if (td_read(td)){
- if (glfs_lstat (g->fs, f->file_name, &sb) || sb.st_size < f->real_file_size){
- dprint(FD_FILE, "fio extend file %s from %ld to %ld\n", f->file_name, sb.st_size, f->real_file_size);
- ret = glfs_ftruncate (g->fd, f->real_file_size);
- if (ret){
- log_err("failed fio extend file %s to %ld\n", f->file_name, f->real_file_size);
- }else{
- unsigned long long left;
- unsigned int bs;
- char *b;
- int r;
-
- /* fill the file, copied from extend_file */
- b = malloc(td->o.max_bs[DDIR_WRITE]);
-
- left = f->real_file_size;
- while (left && !td->terminate) {
- bs = td->o.max_bs[DDIR_WRITE];
- if (bs > left)
- bs = left;
-
- fill_io_buffer(td, b, bs, bs);
-
- r = glfs_write(g->fd, b, bs, 0);
- dprint(FD_IO, "fio write %d of %ld file %s\n", r, f->real_file_size, f->file_name);
-
- if (r > 0) {
- left -= r;
- continue;
- } else {
- if (r < 0) {
- int __e = errno;
-
- if (__e == ENOSPC) {
- if (td->o.fill_device)
- break;
- log_info("fio: ENOSPC on laying out "
- "file, stopping\n");
- break;
- }
- td_verror(td, errno, "write");
- } else
- td_verror(td, EIO, "write");
-
- break;
- }
- }
-
- if (b) free(b);
- glfs_lseek(g->fd, 0, SEEK_SET);
-
- if (td->terminate) {
- dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
- unlink(f->file_name);
- } else if (td->o.create_fsync) {
- if (glfs_fsync(g->fd) < 0) {
- dprint(FD_FILE, "failed to sync, close %s\n", f->file_name);
- td_verror(td, errno, "fsync");
- glfs_close(g->fd);
- g->fd = NULL;
- return 1;
- }
- }
- }
- }
- }
+ int flags = 0;
+ int ret = 0;
+ struct gf_data *g = td->io_ops->data;
+ struct stat sb = { 0, };
+
+ if (td_write(td)) {
+ if (!read_only)
+ flags = O_RDWR;
+ } else if (td_read(td)) {
+ if (!read_only)
+ flags = O_RDWR;
+ else
+ flags = O_RDONLY;
+ }
+ dprint(FD_FILE, "fio file %s open mode %s td rw %s\n", f->file_name,
+ flags == O_RDONLY ? "ro" : "rw", td_read(td) ? "read" : "write");
+ g->fd = glfs_creat(g->fs, f->file_name, flags, 0644);
+ if (!g->fd) {
+ log_err("glfs_creat failed.\n");
+ ret = errno;
+ }
+ /* file for read doesn't exist or shorter than required, create/extend it */
+ if (td_read(td)) {
+ if (glfs_lstat(g->fs, f->file_name, &sb)
+ || sb.st_size < f->real_file_size) {
+ dprint(FD_FILE, "fio extend file %s from %ld to %ld\n",
+ f->file_name, sb.st_size, f->real_file_size);
+ ret = glfs_ftruncate(g->fd, f->real_file_size);
+ if (ret) {
+ log_err("failed fio extend file %s to %ld\n",
+ f->file_name, f->real_file_size);
+ } else {
+ unsigned long long left;
+ unsigned int bs;
+ char *b;
+ int r;
+
+ /* fill the file, copied from extend_file */
+ b = malloc(td->o.max_bs[DDIR_WRITE]);
+
+ left = f->real_file_size;
+ while (left && !td->terminate) {
+ bs = td->o.max_bs[DDIR_WRITE];
+ if (bs > left)
+ bs = left;
+
+ fill_io_buffer(td, b, bs, bs);
+
+ r = glfs_write(g->fd, b, bs, 0);
+ dprint(FD_IO,
+ "fio write %d of %ld file %s\n",
+ r, f->real_file_size,
+ f->file_name);
+
+ if (r > 0) {
+ left -= r;
+ continue;
+ } else {
+ if (r < 0) {
+ int __e = errno;
+
+ if (__e == ENOSPC) {
+ if (td->o.
+ fill_device)
+ break;
+ log_info
+ ("fio: ENOSPC on laying out "
+ "file, stopping\n");
+ break;
+ }
+ td_verror(td, errno,
+ "write");
+ } else
+ td_verror(td, EIO,
+ "write");
+
+ break;
+ }
+ }
+
+ if (b)
+ free(b);
+ glfs_lseek(g->fd, 0, SEEK_SET);
+
+ if (td->terminate) {
+ dprint(FD_FILE, "terminate unlink %s\n",
+ f->file_name);
+ unlink(f->file_name);
+ } else if (td->o.create_fsync) {
+ if (glfs_fsync(g->fd) < 0) {
+ dprint(FD_FILE,
+ "failed to sync, close %s\n",
+ f->file_name);
+ td_verror(td, errno, "fsync");
+ glfs_close(g->fd);
+ g->fd = NULL;
+ return 1;
+ }
+ }
+ }
+ }
+ }
#if defined(GFAPI_USE_FADVISE)
- {
- int r = 0;
- if (td_random(td)){
- r = glfs_fadvise(g->fd, 0, f->real_file_size, POSIX_FADV_RANDOM);
- }else{
- r = glfs_fadvise(g->fd, 0, f->real_file_size, POSIX_FADV_SEQUENTIAL);
- }
- if (r){
- dprint(FD_FILE, "fio %p fadvise %s status %d\n", g->fs, f->file_name, r);
- }
- }
+ {
+ int r = 0;
+ if (td_random(td)) {
+ r = glfs_fadvise(g->fd, 0, f->real_file_size,
+ POSIX_FADV_RANDOM);
+ } else {
+ r = glfs_fadvise(g->fd, 0, f->real_file_size,
+ POSIX_FADV_SEQUENTIAL);
+ }
+ if (r) {
+ dprint(FD_FILE, "fio %p fadvise %s status %d\n", g->fs,
+ f->file_name, r);
+ }
+ }
#endif
- dprint(FD_FILE, "fio %p created %s\n", g->fs, f->file_name);
- f->fd = -1;
- f->shadow_fd = -1;
+ dprint(FD_FILE, "fio %p created %s\n", g->fs, f->file_name);
+ f->fd = -1;
+ f->shadow_fd = -1;
- return ret;
+ return ret;
}
int fio_gf_close_file(struct thread_data *td, struct fio_file *f)
dprint(FD_FILE, "fd close %s\n", f->file_name);
- if (g){
- if (g->fd && glfs_close(g->fd) < 0)
- ret = errno;
+ if (g) {
+ if (g->fd && glfs_close(g->fd) < 0)
+ ret = errno;
- if (g->fs)
- glfs_fini(g->fs);
+ if (g->fs)
+ glfs_fini(g->fs);
- g->fd = NULL;
- free(g);
- }
+ g->fd = NULL;
+ free(g);
+ }
td->io_ops->data = NULL;
f->engine_data = 0;
return ret;
}
-
}
static int fio_gf_getevents(struct thread_data *td, unsigned int min,
- unsigned int max, struct timespec *t)
+ unsigned int max, struct timespec *t)
{
struct gf_data *g = td->io_ops->data;
unsigned int events = 0;
g->aio_events[events] = io_u;
events++;
- if (events >= max)
- break;
+ if (events >= max)
+ break;
}
}
struct fio_gf_iou *io = io_u->engine_data;
if (io) {
- if (io->io_complete){
- log_err("incomplete IO found.\n");
- }
+ if (io->io_complete) {
+ log_err("incomplete IO found.\n");
+ }
io_u->engine_data = NULL;
free(io);
}
- fprintf(stderr, "issued %lu finished %lu\n", issued, cb_count);
+ fprintf(stderr, "issued %lu finished %lu\n", issued, cb_count);
}
static int fio_gf_io_u_init(struct thread_data *td, struct io_u *io_u)
dprint(FD_FILE, "%s\n", __FUNCTION__);
- if (!io_u->engine_data){
- io = malloc(sizeof(struct fio_gf_iou));
- if (!io){
- td_verror(td, errno, "malloc");
- return 1;
- }
- io->io_complete = 0;
- io->io_u = io_u;
- io_u->engine_data = io;
- }
+ if (!io_u->engine_data) {
+ io = malloc(sizeof(struct fio_gf_iou));
+ if (!io) {
+ td_verror(td, errno, "malloc");
+ return 1;
+ }
+ io->io_complete = 0;
+ io->io_u = io_u;
+ io_u->engine_data = io;
+ }
return 0;
}
-static void gf_async_cb(glfs_fd_t *fd, ssize_t ret, void *data)
+static void gf_async_cb(glfs_fd_t * fd, ssize_t ret, void *data)
{
struct io_u *io_u = (struct io_u *)data;
- struct fio_gf_iou *iou =
- (struct fio_gf_iou *)io_u->engine_data;
+ struct fio_gf_iou *iou = (struct fio_gf_iou *)io_u->engine_data;
- dprint(FD_IO, "%s ret %lu\n", __FUNCTION__, ret);
- iou->io_complete = 1;
- cb_count ++;
+ dprint(FD_IO, "%s ret %lu\n", __FUNCTION__, ret);
+ iou->io_complete = 1;
+ cb_count++;
}
-static int fio_gf_async_queue(struct thread_data fio_unused *td, struct io_u *io_u)
+static int fio_gf_async_queue(struct thread_data fio_unused * td,
+ struct io_u *io_u)
{
struct gf_data *g = td->io_ops->data;
- int r = 0;
+ int r = 0;
- dprint(FD_IO, "%s op %s\n", __FUNCTION__,
- io_u->ddir == DDIR_READ? "read": io_u->ddir == DDIR_WRITE? "write":io_u->ddir == DDIR_SYNC? "sync":"unknown");
+ dprint(FD_IO, "%s op %s\n", __FUNCTION__,
+ io_u->ddir == DDIR_READ ? "read" : io_u->ddir ==
+ DDIR_WRITE ? "write" : io_u->ddir ==
+ DDIR_SYNC ? "sync" : "unknown");
fio_ro_check(td, io_u);
if (io_u->ddir == DDIR_READ)
- r = glfs_pread_async(g->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset,
- 0, gf_async_cb, (void *)io_u);
+ r = glfs_pread_async(g->fd, io_u->xfer_buf, io_u->xfer_buflen,
+ io_u->offset, 0, gf_async_cb,
+ (void *)io_u);
else if (io_u->ddir == DDIR_WRITE)
- r = glfs_pwrite_async(g->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset,
- 0, gf_async_cb, (void *)io_u);
- else if (io_u->ddir == DDIR_SYNC) {
- r = glfs_fsync_async(g->fd, gf_async_cb, (void *)io_u);
- }else {
- log_err("unsupported operation.\n");
- io_u->error = -EINVAL;
- goto failed;
- }
- if (r){
- log_err("glfs failed.\n");
- io_u->error = r;
- goto failed;
- }
- issued ++;
+ r = glfs_pwrite_async(g->fd, io_u->xfer_buf, io_u->xfer_buflen,
+ io_u->offset, 0, gf_async_cb,
+ (void *)io_u);
+ else if (io_u->ddir == DDIR_SYNC) {
+ r = glfs_fsync_async(g->fd, gf_async_cb, (void *)io_u);
+ } else {
+ log_err("unsupported operation.\n");
+ io_u->error = -EINVAL;
+ goto failed;
+ }
+ if (r) {
+ log_err("glfs failed.\n");
+ io_u->error = r;
+ goto failed;
+ }
+ issued++;
return FIO_Q_QUEUED;
failed:
int r = 0;
struct gf_data *g = NULL;
#if defined(NOT_YET)
- fprintf(stderr, "the async interface is still very experimental...\n");
+ fprintf(stderr, "the async interface is still very experimental...\n");
#endif
- r = fio_gf_setup(td);
- if (r){
- return r;
- }
+ r = fio_gf_setup(td);
+ if (r) {
+ return r;
+ }
td->o.use_thread = 1;
- g = td->io_ops->data;
- g->aio_events = malloc(td->o.iodepth * sizeof(struct io_u *));
- if (!g->aio_events){
- r = -ENOMEM;
- fio_gf_cleanup(td);
- return r;
- }
+ g = td->io_ops->data;
+ g->aio_events = malloc(td->o.iodepth * sizeof(struct io_u *));
+ if (!g->aio_events) {
+ r = -ENOMEM;
+ fio_gf_cleanup(td);
+ return r;
+ }
memset(g->aio_events, 0, td->o.iodepth * sizeof(struct io_u *));
- return r;
+ return r;
}
}
static struct ioengine_ops ioengine = {
- .name = "gfapi_async",
- .version = FIO_IOOPS_VERSION,
- .init = fio_gf_async_setup,
- .cleanup = fio_gf_cleanup,
- .prep = fio_gf_async_prep,
- .queue = fio_gf_async_queue,
- .open_file = fio_gf_open_file,
- .close_file = fio_gf_close_file,
- .get_file_size = fio_gf_get_file_size,
- .getevents = fio_gf_getevents,
- .event = fio_gf_event,
- .io_u_init = fio_gf_io_u_init,
- .io_u_free = fio_gf_io_u_free,
- .options = gfapi_options,
+ .name = "gfapi_async",
+ .version = FIO_IOOPS_VERSION,
+ .init = fio_gf_async_setup,
+ .cleanup = fio_gf_cleanup,
+ .prep = fio_gf_async_prep,
+ .queue = fio_gf_async_queue,
+ .open_file = fio_gf_open_file,
+ .close_file = fio_gf_close_file,
+ .get_file_size = fio_gf_get_file_size,
+ .getevents = fio_gf_getevents,
+ .event = fio_gf_event,
+ .io_u_init = fio_gf_io_u_init,
+ .io_u_free = fio_gf_io_u_free,
+ .options = gfapi_options,
.option_struct_size = sizeof(struct gf_options),
- .flags = FIO_DISKLESSIO,
+ .flags = FIO_DISKLESSIO,
};
static void fio_init fio_gf_register(void)
{
- register_ioengine(&ioengine);
+ register_ioengine(&ioengine);
}
static void fio_exit fio_gf_unregister(void)
{
- unregister_ioengine(&ioengine);
+ unregister_ioengine(&ioengine);
}
static int fio_gf_queue(struct thread_data *td, struct io_u *io_u)
{
- struct gf_data *g = td->io_ops->data;
- int ret = 0;
-
- dprint(FD_FILE, "fio queue len %lu\n", io_u->xfer_buflen);
- fio_ro_check(td, io_u);
-
- if (io_u->ddir == DDIR_READ)
- ret = glfs_read(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 0);
- else if (io_u->ddir == DDIR_WRITE)
- ret = glfs_write(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 0);
- else {
- log_err("unsupported operation.\n");
- return -EINVAL;
- }
- dprint(FD_FILE, "fio len %lu ret %d\n", io_u->xfer_buflen, ret);
- if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir))
- LAST_POS(io_u->file) = io_u->offset + ret;
-
- if (ret != (int) io_u->xfer_buflen) {
- if (ret >= 0) {
- io_u->resid = io_u->xfer_buflen - ret;
- io_u->error = 0;
- return FIO_Q_COMPLETED;
- } else
- io_u->error = errno;
- }
-
- if (io_u->error){
- log_err("IO failed.\n");
- td_verror(td, io_u->error, "xfer");
- }
-
- return FIO_Q_COMPLETED;
+ struct gf_data *g = td->io_ops->data;
+ int ret = 0;
+
+ dprint(FD_FILE, "fio queue len %lu\n", io_u->xfer_buflen);
+ fio_ro_check(td, io_u);
+
+ if (io_u->ddir == DDIR_READ)
+ ret = glfs_read(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 0);
+ else if (io_u->ddir == DDIR_WRITE)
+ ret = glfs_write(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 0);
+ else {
+ log_err("unsupported operation.\n");
+ return -EINVAL;
+ }
+ dprint(FD_FILE, "fio len %lu ret %d\n", io_u->xfer_buflen, ret);
+ if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir))
+ LAST_POS(io_u->file) = io_u->offset + ret;
+
+ if (ret != (int)io_u->xfer_buflen) {
+ if (ret >= 0) {
+ io_u->resid = io_u->xfer_buflen - ret;
+ io_u->error = 0;
+ return FIO_Q_COMPLETED;
+ } else
+ io_u->error = errno;
+ }
+
+ if (io_u->error) {
+ log_err("IO failed.\n");
+ td_verror(td, io_u->error, "xfer");
+ }
+
+ return FIO_Q_COMPLETED;
}
static struct ioengine_ops ioengine = {
- .name = "gfapi",
- .version = FIO_IOOPS_VERSION,
- .init = fio_gf_setup,
- .cleanup = fio_gf_cleanup,
- .prep = fio_gf_prep,
- .queue = fio_gf_queue,
- .open_file = fio_gf_open_file,
- .close_file = fio_gf_close_file,
- .get_file_size = fio_gf_get_file_size,
- .options = gfapi_options,
+ .name = "gfapi",
+ .version = FIO_IOOPS_VERSION,
+ .init = fio_gf_setup,
+ .cleanup = fio_gf_cleanup,
+ .prep = fio_gf_prep,
+ .queue = fio_gf_queue,
+ .open_file = fio_gf_open_file,
+ .close_file = fio_gf_close_file,
+ .get_file_size = fio_gf_get_file_size,
+ .options = gfapi_options,
.option_struct_size = sizeof(struct gf_options),
- .flags = FIO_SYNCIO | FIO_DISKLESSIO,
+ .flags = FIO_SYNCIO | FIO_DISKLESSIO,
};
static void fio_init fio_gf_register(void)
{
- register_ioengine(&ioengine);
+ register_ioengine(&ioengine);
}
static void fio_exit fio_gf_unregister(void)
{
- unregister_ioengine(&ioengine);
+ unregister_ioengine(&ioengine);
}