4 * this engine read/write iscsi lun with libiscsi.
9 #include "../optgroup.h"
12 #include <iscsi/iscsi.h>
13 #include <iscsi/scsi-lowlevel.h>
20 struct scsi_task *scsi_task;
21 struct iscsi_lun *iscsi_lun;
26 struct iscsi_info *iscsi_info;
27 struct iscsi_context *iscsi;
28 struct iscsi_url *url;
34 struct iscsi_lun **luns;
37 struct iscsi_task **complete_events;
41 struct iscsi_options {
46 static struct fio_option options[] = {
50 .type = FIO_OPT_STR_STORE,
51 .off1 = offsetof(struct iscsi_options, initiator),
52 .def = "iqn.2019-04.org.fio:fio",
53 .help = "initiator name",
54 .category = FIO_OPT_C_ENGINE,
55 .group = FIO_OPT_G_ISCSI,
63 static int fio_iscsi_setup_lun(struct iscsi_info *iscsi_info,
64 char *initiator, struct fio_file *f, int i)
66 struct iscsi_lun *iscsi_lun = NULL;
67 struct scsi_task *task = NULL;
68 struct scsi_readcapacity16 *rc16 = NULL;
71 iscsi_lun = malloc(sizeof(struct iscsi_lun));
72 memset(iscsi_lun, 0, sizeof(struct iscsi_lun));
74 iscsi_lun->iscsi_info = iscsi_info;
76 iscsi_lun->url = iscsi_parse_full_url(NULL, f->file_name);
77 if (iscsi_lun->url == NULL) {
78 log_err("iscsi: failed to parse url: %s\n", f->file_name);
83 iscsi_lun->iscsi = iscsi_create_context(initiator);
84 if (iscsi_lun->iscsi == NULL) {
85 log_err("iscsi: failed to create iscsi context.\n");
90 if (iscsi_set_targetname(iscsi_lun->iscsi, iscsi_lun->url->target)) {
91 log_err("iscsi: failed to set target name.\n");
96 if (iscsi_set_session_type(iscsi_lun->iscsi, ISCSI_SESSION_NORMAL) != 0) {
97 log_err("iscsi: failed to set session type.\n");
102 if (iscsi_set_header_digest(iscsi_lun->iscsi,
103 ISCSI_HEADER_DIGEST_NONE_CRC32C) != 0) {
104 log_err("iscsi: failed to set header digest.\n");
109 if (iscsi_full_connect_sync(iscsi_lun->iscsi,
110 iscsi_lun->url->portal,
111 iscsi_lun->url->lun)) {
112 log_err("iscsi: failed to connect to LUN : %s\n",
113 iscsi_get_error(iscsi_lun->iscsi));
118 task = iscsi_readcapacity16_sync(iscsi_lun->iscsi, iscsi_lun->url->lun);
119 if (task == NULL || task->status != SCSI_STATUS_GOOD) {
120 log_err("iscsi: failed to send readcapacity command: %s\n",
121 iscsi_get_error(iscsi_lun->iscsi));
126 rc16 = scsi_datain_unmarshall(task);
128 log_err("iscsi: failed to unmarshal readcapacity16 data.\n");
133 iscsi_lun->block_size = rc16->block_length;
134 iscsi_lun->num_blocks = rc16->returned_lba + 1;
136 scsi_free_scsi_task(task);
139 f->real_file_size = iscsi_lun->num_blocks * iscsi_lun->block_size;
140 f->engine_data = iscsi_lun;
142 iscsi_info->luns[i] = iscsi_lun;
143 iscsi_info->pfds[i].fd = iscsi_get_fd(iscsi_lun->iscsi);
147 scsi_free_scsi_task(task);
150 if (ret && iscsi_lun) {
151 if (iscsi_lun->iscsi != NULL) {
152 if (iscsi_is_logged_in(iscsi_lun->iscsi)) {
153 iscsi_logout_sync(iscsi_lun->iscsi);
155 iscsi_destroy_context(iscsi_lun->iscsi);
163 static int fio_iscsi_setup(struct thread_data *td)
165 struct iscsi_options *options = td->eo;
166 struct iscsi_info *iscsi_info = NULL;
171 iscsi_info = malloc(sizeof(struct iscsi_info));
172 iscsi_info->nr_luns = td->o.nr_files;
173 iscsi_info->luns = calloc(iscsi_info->nr_luns, sizeof(struct iscsi_lun*));
174 iscsi_info->pfds = calloc(iscsi_info->nr_luns, sizeof(struct pollfd));
176 iscsi_info->nr_events = 0;
177 iscsi_info->complete_events = calloc(td->o.iodepth, sizeof(struct iscsi_task*));
179 td->io_ops_data = iscsi_info;
181 for_each_file(td, f, i) {
182 ret = fio_iscsi_setup_lun(iscsi_info, options->initiator, f, i);
189 static int fio_iscsi_init(struct thread_data *td) {
193 static void fio_iscsi_cleanup_lun(struct iscsi_lun *iscsi_lun) {
194 if (iscsi_lun->iscsi != NULL) {
195 if (iscsi_is_logged_in(iscsi_lun->iscsi)) {
196 iscsi_logout_sync(iscsi_lun->iscsi);
198 iscsi_destroy_context(iscsi_lun->iscsi);
203 static void fio_iscsi_cleanup(struct thread_data *td)
205 struct iscsi_info *iscsi_info = td->io_ops_data;
207 for (int i = 0; i < iscsi_info->nr_luns; i++) {
208 if (iscsi_info->luns[i]) {
209 fio_iscsi_cleanup_lun(iscsi_info->luns[i]);
210 iscsi_info->luns[i] = NULL;
214 free(iscsi_info->luns);
215 free(iscsi_info->pfds);
216 free(iscsi_info->complete_events);
220 static int fio_iscsi_prep(struct thread_data *td, struct io_u *io_u)
225 static int fio_iscsi_open_file(struct thread_data *td, struct fio_file *f)
230 static int fio_iscsi_close_file(struct thread_data *td, struct fio_file *f)
235 static void iscsi_cb(struct iscsi_context *iscsi, int status,
236 void *command_data, void *private_data)
238 struct iscsi_task *iscsi_task = (struct iscsi_task*)private_data;
239 struct iscsi_lun *iscsi_lun = iscsi_task->iscsi_lun;
240 struct iscsi_info *iscsi_info = iscsi_lun->iscsi_info;
241 struct io_u *io_u = iscsi_task->io_u;
243 if (status == SCSI_STATUS_GOOD) {
246 log_err("iscsi: request failed with error %s.\n",
247 iscsi_get_error(iscsi_lun->iscsi));
250 io_u->resid = io_u->xfer_buflen;
253 iscsi_info->complete_events[iscsi_info->nr_events] = iscsi_task;
254 iscsi_info->nr_events++;
257 static enum fio_q_status fio_iscsi_queue(struct thread_data *td,
260 struct iscsi_lun *iscsi_lun = io_u->file->engine_data;
261 struct scsi_task *scsi_task = NULL;
262 struct iscsi_task *iscsi_task = malloc(sizeof(struct iscsi_task));
265 if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) {
266 if (io_u->offset % iscsi_lun->block_size != 0) {
267 log_err("iscsi: offset is not align to block size.\n");
272 if (io_u->xfer_buflen % iscsi_lun->block_size != 0) {
273 log_err("iscsi: buflen is not align to block size.\n");
279 if (io_u->ddir == DDIR_READ) {
280 scsi_task = scsi_cdb_read16(io_u->offset / iscsi_lun->block_size,
282 iscsi_lun->block_size,
284 ret = scsi_task_add_data_in_buffer(scsi_task, io_u->xfer_buflen,
287 log_err("iscsi: failed to add data in buffer.\n");
290 } else if (io_u->ddir == DDIR_WRITE) {
291 scsi_task = scsi_cdb_write16(io_u->offset / iscsi_lun->block_size,
293 iscsi_lun->block_size,
295 ret = scsi_task_add_data_out_buffer(scsi_task, io_u->xfer_buflen,
298 log_err("iscsi: failed to add data out buffer.\n");
301 } else if (ddir_sync(io_u->ddir)) {
302 scsi_task = scsi_cdb_synchronizecache16(
303 0, iscsi_lun->num_blocks * iscsi_lun->block_size, 0, 0);
305 log_err("iscsi: invalid I/O operation: %d\n", io_u->ddir);
310 iscsi_task->scsi_task = scsi_task;
311 iscsi_task->iscsi_lun = iscsi_lun;
312 iscsi_task->io_u = io_u;
314 ret = iscsi_scsi_command_async(iscsi_lun->iscsi, iscsi_lun->url->lun,
315 scsi_task, iscsi_cb, NULL, iscsi_task);
317 log_err("iscsi: failed to send scsi command.\n");
329 scsi_free_scsi_task(scsi_task);
335 return FIO_Q_COMPLETED;
338 static int fio_iscsi_getevents(struct thread_data *td, unsigned int min,
339 unsigned int max, const struct timespec *t)
341 struct iscsi_info *iscsi_info = td->io_ops_data;
344 iscsi_info->nr_events = 0;
346 while (iscsi_info->nr_events < min) {
347 for (int i = 0; i < iscsi_info->nr_luns; i++) {
348 int events = iscsi_which_events(iscsi_info->luns[i]->iscsi);
349 iscsi_info->pfds[i].events = events;
352 ret = poll(iscsi_info->pfds, iscsi_info->nr_luns, -1);
354 if (errno == EINTR || errno == EAGAIN) {
357 log_err("iscsi: failed to poll events: %s.\n",
362 for (int i = 0; i < iscsi_info->nr_luns; i++) {
363 ret = iscsi_service(iscsi_info->luns[i]->iscsi,
364 iscsi_info->pfds[i].revents);
369 return ret < 0 ? ret : iscsi_info->nr_events;
372 static struct io_u *fio_iscsi_event(struct thread_data *td, int event)
374 struct iscsi_info *iscsi_info = (struct iscsi_info*)td->io_ops_data;
375 struct iscsi_task *iscsi_task = iscsi_info->complete_events[event];
376 struct io_u *io_u = iscsi_task->io_u;
378 iscsi_info->complete_events[event] = NULL;
380 scsi_free_scsi_task(iscsi_task->scsi_task);
386 FIO_STATIC struct ioengine_ops ioengine = {
388 .version = FIO_IOOPS_VERSION,
389 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_NODISKUTIL,
390 .setup = fio_iscsi_setup,
391 .init = fio_iscsi_init,
392 .prep = fio_iscsi_prep,
393 .queue = fio_iscsi_queue,
394 .getevents = fio_iscsi_getevents,
395 .event = fio_iscsi_event,
396 .cleanup = fio_iscsi_cleanup,
397 .open_file = fio_iscsi_open_file,
398 .close_file = fio_iscsi_close_file,
399 .option_struct_size = sizeof(struct iscsi_options),
403 static void fio_init fio_iscsi_register(void)
405 register_ioengine(&ioengine);
408 static void fio_exit fio_iscsi_unregister(void)
410 unregister_ioengine(&ioengine);