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Fix floating point option range formatting
[fio.git] / engines / sg.c
... / ...
CommitLineData
1/*
2 * sg engine
3 *
4 * IO engine that uses the Linux SG v3 interface to talk to SCSI devices
5 *
6 */
7#include <stdio.h>
8#include <stdlib.h>
9#include <unistd.h>
10#include <errno.h>
11#include <poll.h>
12
13#include "../fio.h"
14#include "../optgroup.h"
15
16#ifdef FIO_HAVE_SGIO
17
18
19struct sg_options {
20 void *pad;
21 unsigned int readfua;
22 unsigned int writefua;
23};
24
25static struct fio_option options[] = {
26 {
27 .name = "readfua",
28 .lname = "sg engine read fua flag support",
29 .type = FIO_OPT_BOOL,
30 .off1 = offsetof(struct sg_options, readfua),
31 .help = "Set FUA flag (force unit access) for all Read operations",
32 .def = "0",
33 .category = FIO_OPT_C_ENGINE,
34 .group = FIO_OPT_G_SG,
35 },
36 {
37 .name = "writefua",
38 .lname = "sg engine write fua flag support",
39 .type = FIO_OPT_BOOL,
40 .off1 = offsetof(struct sg_options, writefua),
41 .help = "Set FUA flag (force unit access) for all Write operations",
42 .def = "0",
43 .category = FIO_OPT_C_ENGINE,
44 .group = FIO_OPT_G_SG,
45 },
46 {
47 .name = NULL,
48 },
49};
50
51#define MAX_10B_LBA 0xFFFFFFFFULL
52#define SCSI_TIMEOUT_MS 30000 // 30 second timeout; currently no method to override
53#define MAX_SB 64 // sense block maximum return size
54
55struct sgio_cmd {
56 unsigned char cdb[16]; // enhanced from 10 to support 16 byte commands
57 unsigned char sb[MAX_SB]; // add sense block to commands
58 int nr;
59};
60
61struct sgio_data {
62 struct sgio_cmd *cmds;
63 struct io_u **events;
64 struct pollfd *pfds;
65 int *fd_flags;
66 void *sgbuf;
67 unsigned int bs;
68 int type_checked;
69};
70
71static void sgio_hdr_init(struct sgio_data *sd, struct sg_io_hdr *hdr,
72 struct io_u *io_u, int fs)
73{
74 struct sgio_cmd *sc = &sd->cmds[io_u->index];
75
76 memset(hdr, 0, sizeof(*hdr));
77 memset(sc->cdb, 0, sizeof(sc->cdb));
78
79 hdr->interface_id = 'S';
80 hdr->cmdp = sc->cdb;
81 hdr->cmd_len = sizeof(sc->cdb);
82 hdr->sbp = sc->sb;
83 hdr->mx_sb_len = sizeof(sc->sb);
84 hdr->pack_id = io_u->index;
85 hdr->usr_ptr = io_u;
86
87 if (fs) {
88 hdr->dxferp = io_u->xfer_buf;
89 hdr->dxfer_len = io_u->xfer_buflen;
90 }
91}
92
93static int pollin_events(struct pollfd *pfds, int fds)
94{
95 int i;
96
97 for (i = 0; i < fds; i++)
98 if (pfds[i].revents & POLLIN)
99 return 1;
100
101 return 0;
102}
103
104static int sg_fd_read(int fd, void *data, size_t size)
105{
106 int err = 0;
107
108 while (size) {
109 ssize_t ret;
110
111 ret = read(fd, data, size);
112 if (ret < 0) {
113 if (errno == EAGAIN || errno == EINTR)
114 continue;
115 err = errno;
116 break;
117 } else if (!ret)
118 break;
119 else {
120 data += ret;
121 size -= ret;
122 }
123 }
124
125 if (err)
126 return err;
127 if (size)
128 return EAGAIN;
129
130 return 0;
131}
132
133static int fio_sgio_getevents(struct thread_data *td, unsigned int min,
134 unsigned int max,
135 const struct timespec fio_unused *t)
136{
137 struct sgio_data *sd = td->io_ops_data;
138 int left = max, eventNum, ret, r = 0;
139 void *buf = sd->sgbuf;
140 unsigned int i, events;
141 struct fio_file *f;
142
143 /*
144 * Fill in the file descriptors
145 */
146 for_each_file(td, f, i) {
147 /*
148 * don't block for min events == 0
149 */
150 if (!min)
151 sd->fd_flags[i] = fio_set_fd_nonblocking(f->fd, "sg");
152 else
153 sd->fd_flags[i] = -1;
154
155 sd->pfds[i].fd = f->fd;
156 sd->pfds[i].events = POLLIN;
157 }
158
159 while (left) {
160 char *p;
161
162 dprint(FD_IO, "sgio_getevents: sd %p: left=%d\n", sd, left);
163
164 do {
165 if (!min)
166 break;
167
168 ret = poll(sd->pfds, td->o.nr_files, -1);
169 if (ret < 0) {
170 if (!r)
171 r = -errno;
172 td_verror(td, errno, "poll");
173 break;
174 } else if (!ret)
175 continue;
176
177 if (pollin_events(sd->pfds, td->o.nr_files))
178 break;
179 } while (1);
180
181 if (r < 0)
182 break;
183
184re_read:
185 p = buf;
186 events = 0;
187 for_each_file(td, f, i) {
188 for (eventNum = 0; eventNum < left; eventNum++) {
189 ret = sg_fd_read(f->fd, p, sizeof(struct sg_io_hdr));
190 dprint(FD_IO, "sgio_getevents: ret: %d\n", ret);
191 if (ret) {
192 r = -ret;
193 td_verror(td, r, "sg_read");
194 break;
195 }
196 p += sizeof(struct sg_io_hdr);
197 events++;
198 dprint(FD_IO, "sgio_getevents: events: %d\n", events);
199 }
200 }
201
202 if (r < 0 && !events)
203 break;
204 if (!events) {
205 usleep(1000);
206 goto re_read;
207 }
208
209 left -= events;
210 r += events;
211
212 for (i = 0; i < events; i++) {
213 struct sg_io_hdr *hdr = (struct sg_io_hdr *) buf + i;
214 sd->events[i] = hdr->usr_ptr;
215
216 /* record if an io error occurred, ignore resid */
217 if (hdr->info & SG_INFO_CHECK) {
218 struct io_u *io_u;
219 io_u = (struct io_u *)(hdr->usr_ptr);
220 memcpy(&io_u->hdr, hdr, sizeof(struct sg_io_hdr));
221 sd->events[i]->error = EIO;
222 }
223 }
224 }
225
226 if (!min) {
227 for_each_file(td, f, i) {
228 if (sd->fd_flags[i] == -1)
229 continue;
230
231 if (fcntl(f->fd, F_SETFL, sd->fd_flags[i]) < 0)
232 log_err("fio: sg failed to restore fcntl flags: %s\n", strerror(errno));
233 }
234 }
235
236 return r;
237}
238
239static int fio_sgio_ioctl_doio(struct thread_data *td,
240 struct fio_file *f, struct io_u *io_u)
241{
242 struct sgio_data *sd = td->io_ops_data;
243 struct sg_io_hdr *hdr = &io_u->hdr;
244 int ret;
245
246 sd->events[0] = io_u;
247
248 ret = ioctl(f->fd, SG_IO, hdr);
249 if (ret < 0)
250 return ret;
251
252 /* record if an io error occurred */
253 if (hdr->info & SG_INFO_CHECK)
254 io_u->error = EIO;
255
256 return FIO_Q_COMPLETED;
257}
258
259static int fio_sgio_rw_doio(struct fio_file *f, struct io_u *io_u, int do_sync)
260{
261 struct sg_io_hdr *hdr = &io_u->hdr;
262 int ret;
263
264 ret = write(f->fd, hdr, sizeof(*hdr));
265 if (ret < 0)
266 return ret;
267
268 if (do_sync) {
269 ret = read(f->fd, hdr, sizeof(*hdr));
270 if (ret < 0)
271 return ret;
272
273 /* record if an io error occurred */
274 if (hdr->info & SG_INFO_CHECK)
275 io_u->error = EIO;
276
277 return FIO_Q_COMPLETED;
278 }
279
280 return FIO_Q_QUEUED;
281}
282
283static int fio_sgio_doio(struct thread_data *td, struct io_u *io_u, int do_sync)
284{
285 struct fio_file *f = io_u->file;
286 int ret;
287
288 if (f->filetype == FIO_TYPE_BLOCK) {
289 ret = fio_sgio_ioctl_doio(td, f, io_u);
290 td_verror(td, io_u->error, __func__);
291 } else {
292 ret = fio_sgio_rw_doio(f, io_u, do_sync);
293 if (do_sync)
294 td_verror(td, io_u->error, __func__);
295 }
296
297 return ret;
298}
299
300static int fio_sgio_prep(struct thread_data *td, struct io_u *io_u)
301{
302 struct sg_io_hdr *hdr = &io_u->hdr;
303 struct sg_options *o = td->eo;
304 struct sgio_data *sd = td->io_ops_data;
305 long long nr_blocks, lba;
306
307 if (io_u->xfer_buflen & (sd->bs - 1)) {
308 log_err("read/write not sector aligned\n");
309 return EINVAL;
310 }
311
312 nr_blocks = io_u->xfer_buflen / sd->bs;
313 lba = io_u->offset / sd->bs;
314
315 if (io_u->ddir == DDIR_READ) {
316 sgio_hdr_init(sd, hdr, io_u, 1);
317
318 hdr->dxfer_direction = SG_DXFER_FROM_DEV;
319 if (lba < MAX_10B_LBA)
320 hdr->cmdp[0] = 0x28; // read(10)
321 else
322 hdr->cmdp[0] = 0x88; // read(16)
323
324 if (o->readfua)
325 hdr->cmdp[1] |= 0x08;
326
327 } else if (io_u->ddir == DDIR_WRITE) {
328 sgio_hdr_init(sd, hdr, io_u, 1);
329
330 hdr->dxfer_direction = SG_DXFER_TO_DEV;
331 if (lba < MAX_10B_LBA)
332 hdr->cmdp[0] = 0x2a; // write(10)
333 else
334 hdr->cmdp[0] = 0x8a; // write(16)
335
336 if (o->writefua)
337 hdr->cmdp[1] |= 0x08;
338
339 } else {
340 sgio_hdr_init(sd, hdr, io_u, 0);
341 hdr->dxfer_direction = SG_DXFER_NONE;
342 if (lba < MAX_10B_LBA)
343 hdr->cmdp[0] = 0x35; // synccache(10)
344 else
345 hdr->cmdp[0] = 0x91; // synccache(16)
346 }
347
348 /*
349 * for synccache, we leave lba and length to 0 to sync all
350 * blocks on medium.
351 */
352 if (hdr->dxfer_direction != SG_DXFER_NONE) {
353 if (lba < MAX_10B_LBA) {
354 hdr->cmdp[2] = (unsigned char) ((lba >> 24) & 0xff);
355 hdr->cmdp[3] = (unsigned char) ((lba >> 16) & 0xff);
356 hdr->cmdp[4] = (unsigned char) ((lba >> 8) & 0xff);
357 hdr->cmdp[5] = (unsigned char) (lba & 0xff);
358 hdr->cmdp[7] = (unsigned char) ((nr_blocks >> 8) & 0xff);
359 hdr->cmdp[8] = (unsigned char) (nr_blocks & 0xff);
360 } else {
361 hdr->cmdp[2] = (unsigned char) ((lba >> 56) & 0xff);
362 hdr->cmdp[3] = (unsigned char) ((lba >> 48) & 0xff);
363 hdr->cmdp[4] = (unsigned char) ((lba >> 40) & 0xff);
364 hdr->cmdp[5] = (unsigned char) ((lba >> 32) & 0xff);
365 hdr->cmdp[6] = (unsigned char) ((lba >> 24) & 0xff);
366 hdr->cmdp[7] = (unsigned char) ((lba >> 16) & 0xff);
367 hdr->cmdp[8] = (unsigned char) ((lba >> 8) & 0xff);
368 hdr->cmdp[9] = (unsigned char) (lba & 0xff);
369 hdr->cmdp[10] = (unsigned char) ((nr_blocks >> 32) & 0xff);
370 hdr->cmdp[11] = (unsigned char) ((nr_blocks >> 16) & 0xff);
371 hdr->cmdp[12] = (unsigned char) ((nr_blocks >> 8) & 0xff);
372 hdr->cmdp[13] = (unsigned char) (nr_blocks & 0xff);
373 }
374 }
375
376 hdr->timeout = SCSI_TIMEOUT_MS;
377 return 0;
378}
379
380static int fio_sgio_queue(struct thread_data *td, struct io_u *io_u)
381{
382 struct sg_io_hdr *hdr = &io_u->hdr;
383 int ret, do_sync = 0;
384
385 fio_ro_check(td, io_u);
386
387 if (td->o.sync_io || td->o.odirect || ddir_sync(io_u->ddir))
388 do_sync = 1;
389
390 ret = fio_sgio_doio(td, io_u, do_sync);
391
392 if (ret < 0)
393 io_u->error = errno;
394 else if (hdr->status) {
395 io_u->resid = hdr->resid;
396 io_u->error = EIO;
397 }
398
399 if (io_u->error) {
400 td_verror(td, io_u->error, "xfer");
401 return FIO_Q_COMPLETED;
402 }
403
404 return ret;
405}
406
407static struct io_u *fio_sgio_event(struct thread_data *td, int event)
408{
409 struct sgio_data *sd = td->io_ops_data;
410
411 return sd->events[event];
412}
413
414static int fio_sgio_read_capacity(struct thread_data *td, unsigned int *bs,
415 unsigned long long *max_lba)
416{
417 /*
418 * need to do read capacity operation w/o benefit of sd or
419 * io_u structures, which are not initialized until later.
420 */
421 struct sg_io_hdr hdr;
422 unsigned char cmd[16];
423 unsigned char sb[64];
424 unsigned char buf[32]; // read capacity return
425 int ret;
426 int fd = -1;
427
428 struct fio_file *f = td->files[0];
429
430 /* open file independent of rest of application */
431 fd = open(f->file_name, O_RDONLY);
432 if (fd < 0)
433 return -errno;
434
435 memset(&hdr, 0, sizeof(hdr));
436 memset(cmd, 0, sizeof(cmd));
437 memset(sb, 0, sizeof(sb));
438 memset(buf, 0, sizeof(buf));
439
440 /* First let's try a 10 byte read capacity. */
441 hdr.interface_id = 'S';
442 hdr.cmdp = cmd;
443 hdr.cmd_len = 10;
444 hdr.sbp = sb;
445 hdr.mx_sb_len = sizeof(sb);
446 hdr.timeout = SCSI_TIMEOUT_MS;
447 hdr.cmdp[0] = 0x25; // Read Capacity(10)
448 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
449 hdr.dxferp = buf;
450 hdr.dxfer_len = sizeof(buf);
451
452 ret = ioctl(fd, SG_IO, &hdr);
453 if (ret < 0) {
454 close(fd);
455 return ret;
456 }
457
458 *bs = ((unsigned long) buf[4] << 24) | ((unsigned long) buf[5] << 16) |
459 ((unsigned long) buf[6] << 8) | (unsigned long) buf[7];
460 *max_lba = ((unsigned long) buf[0] << 24) | ((unsigned long) buf[1] << 16) |
461 ((unsigned long) buf[2] << 8) | (unsigned long) buf[3];
462
463 /*
464 * If max lba masked by MAX_10B_LBA equals MAX_10B_LBA,
465 * then need to retry with 16 byte Read Capacity command.
466 */
467 if (*max_lba == MAX_10B_LBA) {
468 hdr.cmd_len = 16;
469 hdr.cmdp[0] = 0x9e; // service action
470 hdr.cmdp[1] = 0x10; // Read Capacity(16)
471 hdr.cmdp[10] = (unsigned char) ((sizeof(buf) >> 24) & 0xff);
472 hdr.cmdp[11] = (unsigned char) ((sizeof(buf) >> 16) & 0xff);
473 hdr.cmdp[12] = (unsigned char) ((sizeof(buf) >> 8) & 0xff);
474 hdr.cmdp[13] = (unsigned char) (sizeof(buf) & 0xff);
475
476 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
477 hdr.dxferp = buf;
478 hdr.dxfer_len = sizeof(buf);
479
480 ret = ioctl(fd, SG_IO, &hdr);
481 if (ret < 0) {
482 close(fd);
483 return ret;
484 }
485
486 /* record if an io error occurred */
487 if (hdr.info & SG_INFO_CHECK)
488 td_verror(td, EIO, "fio_sgio_read_capacity");
489
490 *bs = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11];
491 *max_lba = ((unsigned long long)buf[0] << 56) |
492 ((unsigned long long)buf[1] << 48) |
493 ((unsigned long long)buf[2] << 40) |
494 ((unsigned long long)buf[3] << 32) |
495 ((unsigned long long)buf[4] << 24) |
496 ((unsigned long long)buf[5] << 16) |
497 ((unsigned long long)buf[6] << 8) |
498 (unsigned long long)buf[7];
499 }
500
501 close(fd);
502 return 0;
503}
504
505static void fio_sgio_cleanup(struct thread_data *td)
506{
507 struct sgio_data *sd = td->io_ops_data;
508
509 if (sd) {
510 free(sd->events);
511 free(sd->cmds);
512 free(sd->fd_flags);
513 free(sd->pfds);
514 free(sd->sgbuf);
515 free(sd);
516 }
517}
518
519static int fio_sgio_init(struct thread_data *td)
520{
521 struct sgio_data *sd;
522
523 sd = malloc(sizeof(*sd));
524 memset(sd, 0, sizeof(*sd));
525 sd->cmds = malloc(td->o.iodepth * sizeof(struct sgio_cmd));
526 memset(sd->cmds, 0, td->o.iodepth * sizeof(struct sgio_cmd));
527 sd->events = malloc(td->o.iodepth * sizeof(struct io_u *));
528 memset(sd->events, 0, td->o.iodepth * sizeof(struct io_u *));
529 sd->pfds = malloc(sizeof(struct pollfd) * td->o.nr_files);
530 memset(sd->pfds, 0, sizeof(struct pollfd) * td->o.nr_files);
531 sd->fd_flags = malloc(sizeof(int) * td->o.nr_files);
532 memset(sd->fd_flags, 0, sizeof(int) * td->o.nr_files);
533 sd->sgbuf = malloc(sizeof(struct sg_io_hdr) * td->o.iodepth);
534 memset(sd->sgbuf, 0, sizeof(struct sg_io_hdr) * td->o.iodepth);
535 sd->type_checked = 0;
536 td->io_ops_data = sd;
537
538 /*
539 * we want to do it, regardless of whether odirect is set or not
540 */
541 td->o.override_sync = 1;
542 return 0;
543}
544
545static int fio_sgio_type_check(struct thread_data *td, struct fio_file *f)
546{
547 struct sgio_data *sd = td->io_ops_data;
548 unsigned int bs = 0;
549 unsigned long long max_lba = 0;
550
551 if (f->filetype == FIO_TYPE_BLOCK) {
552 if (ioctl(f->fd, BLKSSZGET, &bs) < 0) {
553 td_verror(td, errno, "ioctl");
554 return 1;
555 }
556 } else if (f->filetype == FIO_TYPE_CHAR) {
557 int version, ret;
558
559 if (ioctl(f->fd, SG_GET_VERSION_NUM, &version) < 0) {
560 td_verror(td, errno, "ioctl");
561 return 1;
562 }
563
564 ret = fio_sgio_read_capacity(td, &bs, &max_lba);
565 if (ret) {
566 td_verror(td, td->error, "fio_sgio_read_capacity");
567 log_err("ioengine sg unable to read capacity successfully\n");
568 return 1;
569 }
570 } else {
571 td_verror(td, EINVAL, "wrong file type");
572 log_err("ioengine sg only works on block or character devices\n");
573 return 1;
574 }
575
576 sd->bs = bs;
577 // Determine size of commands needed based on max_lba
578 if (max_lba >= MAX_10B_LBA) {
579 dprint(FD_IO, "sgio_type_check: using 16 byte read/write "
580 "commands for lba above 0x%016llx/0x%016llx\n",
581 MAX_10B_LBA, max_lba);
582 }
583
584 if (f->filetype == FIO_TYPE_BLOCK) {
585 td->io_ops->getevents = NULL;
586 td->io_ops->event = NULL;
587 }
588 sd->type_checked = 1;
589
590 return 0;
591}
592
593static int fio_sgio_open(struct thread_data *td, struct fio_file *f)
594{
595 struct sgio_data *sd = td->io_ops_data;
596 int ret;
597
598 ret = generic_open_file(td, f);
599 if (ret)
600 return ret;
601
602 if (sd && !sd->type_checked && fio_sgio_type_check(td, f)) {
603 ret = generic_close_file(td, f);
604 return 1;
605 }
606
607 return 0;
608}
609
610/*
611 * Build an error string with details about the driver, host or scsi
612 * error contained in the sg header Caller will use as necessary.
613 */
614static char *fio_sgio_errdetails(struct io_u *io_u)
615{
616 struct sg_io_hdr *hdr = &io_u->hdr;
617#define MAXERRDETAIL 1024
618#define MAXMSGCHUNK 128
619 char *msg, msgchunk[MAXMSGCHUNK];
620 int i;
621
622 msg = calloc(1, MAXERRDETAIL);
623 strcpy(msg, "");
624
625 /*
626 * can't seem to find sg_err.h, so I'll just echo the define values
627 * so others can search on internet to find clearer clues of meaning.
628 */
629 if (hdr->info & SG_INFO_CHECK) {
630 if (hdr->host_status) {
631 snprintf(msgchunk, MAXMSGCHUNK, "SG Host Status: 0x%02x; ", hdr->host_status);
632 strlcat(msg, msgchunk, MAXERRDETAIL);
633 switch (hdr->host_status) {
634 case 0x01:
635 strlcat(msg, "SG_ERR_DID_NO_CONNECT", MAXERRDETAIL);
636 break;
637 case 0x02:
638 strlcat(msg, "SG_ERR_DID_BUS_BUSY", MAXERRDETAIL);
639 break;
640 case 0x03:
641 strlcat(msg, "SG_ERR_DID_TIME_OUT", MAXERRDETAIL);
642 break;
643 case 0x04:
644 strlcat(msg, "SG_ERR_DID_BAD_TARGET", MAXERRDETAIL);
645 break;
646 case 0x05:
647 strlcat(msg, "SG_ERR_DID_ABORT", MAXERRDETAIL);
648 break;
649 case 0x06:
650 strlcat(msg, "SG_ERR_DID_PARITY", MAXERRDETAIL);
651 break;
652 case 0x07:
653 strlcat(msg, "SG_ERR_DID_ERROR (internal error)", MAXERRDETAIL);
654 break;
655 case 0x08:
656 strlcat(msg, "SG_ERR_DID_RESET", MAXERRDETAIL);
657 break;
658 case 0x09:
659 strlcat(msg, "SG_ERR_DID_BAD_INTR (unexpected)", MAXERRDETAIL);
660 break;
661 case 0x0a:
662 strlcat(msg, "SG_ERR_DID_PASSTHROUGH", MAXERRDETAIL);
663 break;
664 case 0x0b:
665 strlcat(msg, "SG_ERR_DID_SOFT_ERROR (driver retry?)", MAXERRDETAIL);
666 break;
667 case 0x0c:
668 strlcat(msg, "SG_ERR_DID_IMM_RETRY", MAXERRDETAIL);
669 break;
670 case 0x0d:
671 strlcat(msg, "SG_ERR_DID_REQUEUE", MAXERRDETAIL);
672 break;
673 case 0x0e:
674 strlcat(msg, "SG_ERR_DID_TRANSPORT_DISRUPTED", MAXERRDETAIL);
675 break;
676 case 0x0f:
677 strlcat(msg, "SG_ERR_DID_TRANSPORT_FAILFAST", MAXERRDETAIL);
678 break;
679 case 0x10:
680 strlcat(msg, "SG_ERR_DID_TARGET_FAILURE", MAXERRDETAIL);
681 break;
682 case 0x11:
683 strlcat(msg, "SG_ERR_DID_NEXUS_FAILURE", MAXERRDETAIL);
684 break;
685 case 0x12:
686 strlcat(msg, "SG_ERR_DID_ALLOC_FAILURE", MAXERRDETAIL);
687 break;
688 case 0x13:
689 strlcat(msg, "SG_ERR_DID_MEDIUM_ERROR", MAXERRDETAIL);
690 break;
691 default:
692 strlcat(msg, "Unknown", MAXERRDETAIL);
693 break;
694 }
695 strlcat(msg, ". ", MAXERRDETAIL);
696 }
697 if (hdr->driver_status) {
698 snprintf(msgchunk, MAXMSGCHUNK, "SG Driver Status: 0x%02x; ", hdr->driver_status);
699 strlcat(msg, msgchunk, MAXERRDETAIL);
700 switch (hdr->driver_status & 0x0F) {
701 case 0x01:
702 strlcat(msg, "SG_ERR_DRIVER_BUSY", MAXERRDETAIL);
703 break;
704 case 0x02:
705 strlcat(msg, "SG_ERR_DRIVER_SOFT", MAXERRDETAIL);
706 break;
707 case 0x03:
708 strlcat(msg, "SG_ERR_DRIVER_MEDIA", MAXERRDETAIL);
709 break;
710 case 0x04:
711 strlcat(msg, "SG_ERR_DRIVER_ERROR", MAXERRDETAIL);
712 break;
713 case 0x05:
714 strlcat(msg, "SG_ERR_DRIVER_INVALID", MAXERRDETAIL);
715 break;
716 case 0x06:
717 strlcat(msg, "SG_ERR_DRIVER_TIMEOUT", MAXERRDETAIL);
718 break;
719 case 0x07:
720 strlcat(msg, "SG_ERR_DRIVER_HARD", MAXERRDETAIL);
721 break;
722 case 0x08:
723 strlcat(msg, "SG_ERR_DRIVER_SENSE", MAXERRDETAIL);
724 break;
725 default:
726 strlcat(msg, "Unknown", MAXERRDETAIL);
727 break;
728 }
729 strlcat(msg, "; ", MAXERRDETAIL);
730 switch (hdr->driver_status & 0xF0) {
731 case 0x10:
732 strlcat(msg, "SG_ERR_SUGGEST_RETRY", MAXERRDETAIL);
733 break;
734 case 0x20:
735 strlcat(msg, "SG_ERR_SUGGEST_ABORT", MAXERRDETAIL);
736 break;
737 case 0x30:
738 strlcat(msg, "SG_ERR_SUGGEST_REMAP", MAXERRDETAIL);
739 break;
740 case 0x40:
741 strlcat(msg, "SG_ERR_SUGGEST_DIE", MAXERRDETAIL);
742 break;
743 case 0x80:
744 strlcat(msg, "SG_ERR_SUGGEST_SENSE", MAXERRDETAIL);
745 break;
746 }
747 strlcat(msg, ". ", MAXERRDETAIL);
748 }
749 if (hdr->status) {
750 snprintf(msgchunk, MAXMSGCHUNK, "SG SCSI Status: 0x%02x; ", hdr->status);
751 strlcat(msg, msgchunk, MAXERRDETAIL);
752 // SCSI 3 status codes
753 switch (hdr->status) {
754 case 0x02:
755 strlcat(msg, "CHECK_CONDITION", MAXERRDETAIL);
756 break;
757 case 0x04:
758 strlcat(msg, "CONDITION_MET", MAXERRDETAIL);
759 break;
760 case 0x08:
761 strlcat(msg, "BUSY", MAXERRDETAIL);
762 break;
763 case 0x10:
764 strlcat(msg, "INTERMEDIATE", MAXERRDETAIL);
765 break;
766 case 0x14:
767 strlcat(msg, "INTERMEDIATE_CONDITION_MET", MAXERRDETAIL);
768 break;
769 case 0x18:
770 strlcat(msg, "RESERVATION_CONFLICT", MAXERRDETAIL);
771 break;
772 case 0x22:
773 strlcat(msg, "COMMAND_TERMINATED", MAXERRDETAIL);
774 break;
775 case 0x28:
776 strlcat(msg, "TASK_SET_FULL", MAXERRDETAIL);
777 break;
778 case 0x30:
779 strlcat(msg, "ACA_ACTIVE", MAXERRDETAIL);
780 break;
781 case 0x40:
782 strlcat(msg, "TASK_ABORTED", MAXERRDETAIL);
783 break;
784 default:
785 strlcat(msg, "Unknown", MAXERRDETAIL);
786 break;
787 }
788 strlcat(msg, ". ", MAXERRDETAIL);
789 }
790 if (hdr->sb_len_wr) {
791 snprintf(msgchunk, MAXMSGCHUNK, "Sense Data (%d bytes):", hdr->sb_len_wr);
792 strlcat(msg, msgchunk, MAXERRDETAIL);
793 for (i = 0; i < hdr->sb_len_wr; i++) {
794 snprintf(msgchunk, MAXMSGCHUNK, " %02x", hdr->sbp[i]);
795 strlcat(msg, msgchunk, MAXERRDETAIL);
796 }
797 strlcat(msg, ". ", MAXERRDETAIL);
798 }
799 if (hdr->resid != 0) {
800 snprintf(msgchunk, MAXMSGCHUNK, "SG Driver: %d bytes out of %d not transferred. ", hdr->resid, hdr->dxfer_len);
801 strlcat(msg, msgchunk, MAXERRDETAIL);
802 }
803 }
804
805 if (!(hdr->info & SG_INFO_CHECK) && !strlen(msg))
806 strncpy(msg, "SG Driver did not report a Host, Driver or Device check",
807 MAXERRDETAIL - 1);
808
809 return msg;
810}
811
812/*
813 * get max file size from read capacity.
814 */
815static int fio_sgio_get_file_size(struct thread_data *td, struct fio_file *f)
816{
817 /*
818 * get_file_size is being called even before sgio_init is
819 * called, so none of the sg_io structures are
820 * initialized in the thread_data yet. So we need to do the
821 * ReadCapacity without any of those helpers. One of the effects
822 * is that ReadCapacity may get called 4 times on each open:
823 * readcap(10) followed by readcap(16) if needed - just to get
824 * the file size after the init occurs - it will be called
825 * again when "type_check" is called during structure
826 * initialization I'm not sure how to prevent this little
827 * inefficiency.
828 */
829 unsigned int bs = 0;
830 unsigned long long max_lba = 0;
831 int ret;
832
833 if (fio_file_size_known(f))
834 return 0;
835
836 if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) {
837 td_verror(td, EINVAL, "wrong file type");
838 log_err("ioengine sg only works on block or character devices\n");
839 return 1;
840 }
841
842 ret = fio_sgio_read_capacity(td, &bs, &max_lba);
843 if (ret ) {
844 td_verror(td, td->error, "fio_sgio_read_capacity");
845 log_err("ioengine sg unable to successfully execute read capacity to get block size and maximum lba\n");
846 return 1;
847 }
848
849 f->real_file_size = (max_lba + 1) * bs;
850 fio_file_set_size_known(f);
851 return 0;
852}
853
854
855static struct ioengine_ops ioengine = {
856 .name = "sg",
857 .version = FIO_IOOPS_VERSION,
858 .init = fio_sgio_init,
859 .prep = fio_sgio_prep,
860 .queue = fio_sgio_queue,
861 .getevents = fio_sgio_getevents,
862 .errdetails = fio_sgio_errdetails,
863 .event = fio_sgio_event,
864 .cleanup = fio_sgio_cleanup,
865 .open_file = fio_sgio_open,
866 .close_file = generic_close_file,
867 .get_file_size = fio_sgio_get_file_size,
868 .flags = FIO_SYNCIO | FIO_RAWIO,
869 .options = options,
870 .option_struct_size = sizeof(struct sg_options)
871};
872
873#else /* FIO_HAVE_SGIO */
874
875/*
876 * When we have a proper configure system in place, we simply wont build
877 * and install this io engine. For now install a crippled version that
878 * just complains and fails to load.
879 */
880static int fio_sgio_init(struct thread_data fio_unused *td)
881{
882 log_err("fio: ioengine sg not available\n");
883 return 1;
884}
885
886static struct ioengine_ops ioengine = {
887 .name = "sg",
888 .version = FIO_IOOPS_VERSION,
889 .init = fio_sgio_init,
890};
891
892#endif
893
894static void fio_init fio_sgio_register(void)
895{
896 register_ioengine(&ioengine);
897}
898
899static void fio_exit fio_sgio_unregister(void)
900{
901 unregister_ioengine(&ioengine);
902}
fio - Flexible IO Tester