4 * IO engine that uses the Linux binject interface to directly inject
5 * bio's to block devices.
15 #include <sys/types.h>
20 #ifdef FIO_HAVE_BINJECT
23 struct b_user_cmd *cmds;
35 static void binject_buc_init(struct binject_data *bd, struct io_u *io_u)
37 struct b_user_cmd *buc = &io_u->buc;
39 memset(buc, 0, sizeof(*buc));
40 binject_buc_set_magic(buc);
42 buc->buf = (unsigned long) io_u->xfer_buf;
43 buc->len = io_u->xfer_buflen;
44 buc->offset = io_u->offset;
45 buc->usr_ptr = (unsigned long) io_u;
47 buc->flags = B_FLAG_NOIDLE | B_FLAG_UNPLUG;
51 static int pollin_events(struct pollfd *pfds, int fds)
55 for (i = 0; i < fds; i++)
56 if (pfds[i].revents & POLLIN)
62 static unsigned int binject_read_commands(struct thread_data *td, void *p,
70 for_each_file(td, f, i) {
71 struct binject_file *bf = FILE_ENG_DATA(f);
73 ret = read(bf->fd, p, left * sizeof(struct b_user_cmd));
78 td_verror(td, errno, "read");
82 events += ret / sizeof(struct b_user_cmd);
93 static int fio_binject_getevents(struct thread_data *td, unsigned int min,
95 const struct timespec fio_unused *t)
97 struct binject_data *bd = td->io_ops->data;
98 int left = max, ret, r = 0, ev_index = 0;
100 unsigned int i, events;
104 * Fill in the file descriptors
106 for_each_file(td, f, i) {
107 struct binject_file *bf = FILE_ENG_DATA(f);
110 * don't block for min events == 0
113 bd->fd_flags[i] = fio_set_fd_nonblocking(bf->fd, "binject");
115 bd->fd_flags[i] = -1;
117 bd->pfds[i].fd = bf->fd;
118 bd->pfds[i].events = POLLIN;
123 ret = poll(bd->pfds, td->o.nr_files, -1);
127 td_verror(td, errno, "poll");
132 if (pollin_events(bd->pfds, td->o.nr_files))
139 events = binject_read_commands(td, buf, left, &r);
147 for (i = 0; i < events; i++) {
148 struct b_user_cmd *buc = (struct b_user_cmd *) buf + i;
150 bd->events[ev_index] = (struct io_u *) (unsigned long) buc->usr_ptr;
156 for_each_file(td, f, i) {
157 struct binject_file *bf = FILE_ENG_DATA(f);
159 if (bd->fd_flags[i] == -1)
162 if (fcntl(bf->fd, F_SETFL, bd->fd_flags[i]) < 0)
163 log_err("fio: binject failed to restore fcntl flags: %s\n", strerror(errno));
168 assert(ev_index == r);
173 static int fio_binject_doio(struct thread_data *td, struct io_u *io_u)
175 struct b_user_cmd *buc = &io_u->buc;
176 struct binject_file *bf = FILE_ENG_DATA(io_u->file);
179 ret = write(bf->fd, buc, sizeof(*buc));
186 static int fio_binject_prep(struct thread_data *td, struct io_u *io_u)
188 struct binject_data *bd = td->io_ops->data;
189 struct b_user_cmd *buc = &io_u->buc;
190 struct binject_file *bf = FILE_ENG_DATA(io_u->file);
192 if (io_u->xfer_buflen & (bf->bs - 1)) {
193 log_err("read/write not sector aligned\n");
197 if (io_u->ddir == DDIR_READ) {
198 binject_buc_init(bd, io_u);
199 buc->type = B_TYPE_READ;
200 } else if (io_u->ddir == DDIR_WRITE) {
201 binject_buc_init(bd, io_u);
202 if (io_u->flags & IO_U_F_BARRIER)
203 buc->type = B_TYPE_WRITEBARRIER;
205 buc->type = B_TYPE_WRITE;
206 } else if (io_u->ddir == DDIR_TRIM) {
207 binject_buc_init(bd, io_u);
208 buc->type = B_TYPE_DISCARD;
216 static int fio_binject_queue(struct thread_data *td, struct io_u *io_u)
220 fio_ro_check(td, io_u);
222 ret = fio_binject_doio(td, io_u);
228 td_verror(td, io_u->error, "xfer");
229 return FIO_Q_COMPLETED;
235 static struct io_u *fio_binject_event(struct thread_data *td, int event)
237 struct binject_data *bd = td->io_ops->data;
239 return bd->events[event];
242 static int binject_open_ctl(struct thread_data *td)
246 fd = open("/dev/binject-ctl", O_RDWR);
248 td_verror(td, errno, "open binject-ctl");
253 static void binject_unmap_dev(struct thread_data *td, struct binject_file *bf)
255 struct b_ioctl_cmd bic;
263 fdb = binject_open_ctl(td);
267 bic.minor = bf->minor;
269 if (ioctl(fdb, B_IOCTL_DEL, &bic) < 0)
270 td_verror(td, errno, "binject dev unmap");
275 static int binject_map_dev(struct thread_data *td, struct binject_file *bf,
278 struct b_ioctl_cmd bic;
281 int fdb, dev_there, loops;
283 fdb = binject_open_ctl(td);
289 if (ioctl(fdb, B_IOCTL_ADD, &bic) < 0) {
290 td_verror(td, errno, "binject dev map");
295 bf->minor = bic.minor;
297 sprintf(name, "/dev/binject%u", bf->minor);
300 * Wait for udev to create the node...
302 dev_there = loops = 0;
304 if (!stat(name, &sb)) {
310 } while (++loops < 100);
315 log_err("fio: timed out waiting for binject dev\n");
319 bf->fd = open(name, O_RDWR);
321 td_verror(td, errno, "binject dev open");
323 binject_unmap_dev(td, bf);
330 static int fio_binject_close_file(struct thread_data *td, struct fio_file *f)
332 struct binject_file *bf = FILE_ENG_DATA(f);
335 binject_unmap_dev(td, bf);
337 FILE_SET_ENG_DATA(f, NULL);
338 return generic_close_file(td, f);
344 static int fio_binject_open_file(struct thread_data *td, struct fio_file *f)
346 struct binject_file *bf;
350 ret = generic_open_file(td, f);
354 if (f->filetype != FIO_TYPE_BD) {
355 log_err("fio: binject only works with block devices\n");
358 if (ioctl(f->fd, BLKSSZGET, &bs) < 0) {
359 td_verror(td, errno, "BLKSSZGET");
363 bf = malloc(sizeof(*bf));
365 bf->minor = bf->fd = -1;
366 FILE_SET_ENG_DATA(f, bf);
368 if (binject_map_dev(td, bf, f->fd)) {
370 ret = generic_close_file(td, f);
377 static void fio_binject_cleanup(struct thread_data *td)
379 struct binject_data *bd = td->io_ops->data;
390 static int fio_binject_init(struct thread_data *td)
392 struct binject_data *bd;
394 bd = malloc(sizeof(*bd));
395 memset(bd, 0, sizeof(*bd));
397 bd->cmds = malloc(td->o.iodepth * sizeof(struct b_user_cmd));
398 memset(bd->cmds, 0, td->o.iodepth * sizeof(struct b_user_cmd));
400 bd->events = malloc(td->o.iodepth * sizeof(struct io_u *));
401 memset(bd->events, 0, td->o.iodepth * sizeof(struct io_u *));
403 bd->pfds = malloc(sizeof(struct pollfd) * td->o.nr_files);
404 memset(bd->pfds, 0, sizeof(struct pollfd) * td->o.nr_files);
406 bd->fd_flags = malloc(sizeof(int) * td->o.nr_files);
407 memset(bd->fd_flags, 0, sizeof(int) * td->o.nr_files);
409 td->io_ops->data = bd;
413 static struct ioengine_ops ioengine = {
415 .version = FIO_IOOPS_VERSION,
416 .init = fio_binject_init,
417 .prep = fio_binject_prep,
418 .queue = fio_binject_queue,
419 .getevents = fio_binject_getevents,
420 .event = fio_binject_event,
421 .cleanup = fio_binject_cleanup,
422 .open_file = fio_binject_open_file,
423 .close_file = fio_binject_close_file,
424 .get_file_size = generic_get_file_size,
425 .flags = FIO_RAWIO | FIO_BARRIER | FIO_MEMALIGN,
428 #else /* FIO_HAVE_BINJECT */
431 * When we have a proper configure system in place, we simply wont build
432 * and install this io engine. For now install a crippled version that
433 * just complains and fails to load.
435 static int fio_binject_init(struct thread_data fio_unused *td)
437 log_err("fio: ioengine binject not available\n");
441 static struct ioengine_ops ioengine = {
443 .version = FIO_IOOPS_VERSION,
444 .init = fio_binject_init,
449 static void fio_init fio_binject_register(void)
451 register_ioengine(&ioengine);
454 static void fio_exit fio_binject_unregister(void)
456 unregister_ioengine(&ioengine);