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Use correct I/O engine name "cpuio" instead of "cpu"
[fio.git] / engines / sg.c
CommitLineData
2866c82d 1/*
da751ca9
JA		 2 * sg engine
3 *
4 * IO engine that uses the Linux SG v3 interface to talk to SCSI devices
2866c82d
JA		 5 *
6 */
7#include <stdio.h>
8#include <stdlib.h>
9#include <unistd.h>
10#include <errno.h>
11#include <assert.h>
12#include <sys/poll.h>
5f350952
JA		 13
14#include "../fio.h"
2866c82d 15
34cfcdaf
JA		 16#ifdef FIO_HAVE_SGIO
17
5ad7be56
KD		 18#define MAX_10B_LBA 0xFFFFFFFFULL
19#define SCSI_TIMEOUT_MS 30000 // 30 second timeout; currently no method to override
20#define MAX_SB 64 // sense block maximum return size
21
2866c82d 22struct sgio_cmd {
5ad7be56
KD		 23 unsigned char cdb[16]; // increase to support 16 byte commands
24 unsigned char sb[MAX_SB]; // add sense block to commands
2866c82d
JA		 25 int nr;
26};
27
28struct sgio_data {
29 struct sgio_cmd *cmds;
30 struct io_u **events;
dc0deca2
JA		 31 struct pollfd *pfds;
32 int *fd_flags;
33 void *sgbuf;
2866c82d 34 unsigned int bs;
5ad7be56 35 long long max_lba;
b5af8293 36 int type_checked;
2866c82d
JA		 37};
38
39static void sgio_hdr_init(struct sgio_data *sd, struct sg_io_hdr *hdr,
40 struct io_u *io_u, int fs)
41{
42 struct sgio_cmd *sc = &sd->cmds[io_u->index];
43
44 memset(hdr, 0, sizeof(*hdr));
45 memset(sc->cdb, 0, sizeof(sc->cdb));
46
47 hdr->interface_id = 'S';
48 hdr->cmdp = sc->cdb;
49 hdr->cmd_len = sizeof(sc->cdb);
5ad7be56
KD		 50 hdr->sbp = sc->sb;
51 hdr->mx_sb_len = sizeof(sc->sb);
2866c82d
JA		 52 hdr->pack_id = io_u->index;
53 hdr->usr_ptr = io_u;
54
55 if (fs) {
cec6b55d
JA		 56 hdr->dxferp = io_u->xfer_buf;
57 hdr->dxfer_len = io_u->xfer_buflen;
2866c82d
JA		 58 }
59}
60
adee86c5
JA		 61static int pollin_events(struct pollfd *pfds, int fds)
62{
63 int i;
64
65 for (i = 0; i < fds; i++)
66 if (pfds[i].revents & POLLIN)
67 return 1;
68
69 return 0;
70}
2866c82d 71
14d0261e
JA		 72static int sg_fd_read(int fd, void *data, size_t size)
73{
74 int err = 0;
75
76 while (size) {
77 ssize_t ret;
78
79 ret = read(fd, data, size);
80 if (ret < 0) {
81 if (errno == EAGAIN || errno == EINTR)
82 continue;
83 err = errno;
84 break;
85 } else if (!ret)
86 break;
87 else {
88 data += ret;
89 size -= ret;
90 }
91 }
92
93 if (err)
94 return err;
95 if (size)
96 return EAGAIN;
97
98 return 0;
99}
100
e7d2e616 101static int fio_sgio_getevents(struct thread_data *td, unsigned int min,
1f440ece
JA		 102 unsigned int max,
103 const struct timespec fio_unused *t)
2866c82d
JA		 104{
105 struct sgio_data *sd = td->io_ops->data;
5ad7be56 106 int left = max, eventNum, ret, r = 0;
dc0deca2 107 void *buf = sd->sgbuf;
af52b345 108 unsigned int i, events;
946ff865 109 struct fio_file *f;
2866c82d
JA		 110
111 /*
adee86c5 112 * Fill in the file descriptors
2866c82d 113 */
adee86c5
JA		 114 for_each_file(td, f, i) {
115 /*
116 * don't block for min events == 0
117 */
4a851614 118 if (!min)
3a35845f
JA		 119 sd->fd_flags[i] = fio_set_fd_nonblocking(f->fd, "sg");
120 else
121 sd->fd_flags[i] = -1;
4a851614 122
dc0deca2
JA		 123 sd->pfds[i].fd = f->fd;
124 sd->pfds[i].events = POLLIN;
2866c82d
JA		 125 }
126
127 while (left) {
adee86c5
JA		 128 void *p;
129
5ad7be56
KD		 130 dprint(FD_IO, "sgio_getevents: sd %p: left=%d\n", sd, left);
131
2866c82d
JA		 132 do {
133 if (!min)
134 break;
adee86c5 135
2dc1bbeb 136 ret = poll(sd->pfds, td->o.nr_files, -1);
adee86c5 137 if (ret < 0) {
adee86c5 138 if (!r)
22819ec2 139 r = -errno;
e1161c32 140 td_verror(td, errno, "poll");
adee86c5
JA		 141 break;
142 } else if (!ret)
143 continue;
144
2dc1bbeb 145 if (pollin_events(sd->pfds, td->o.nr_files))
2866c82d
JA		 146 break;
147 } while (1);
148
adee86c5 149 if (r < 0)
2866c82d 150 break;
adee86c5
JA		 151
152re_read:
153 p = buf;
154 events = 0;
155 for_each_file(td, f, i) {
5ad7be56 156 for (eventNum = 0; eventNum < left; eventNum++) {
14d0261e 157 ret = sg_fd_read(f->fd, p, sizeof(struct sg_io_hdr));
5ad7be56 158 dprint(FD_IO, "sgio_getevents: ret: %d\n", ret);
14d0261e
JA		 159 if (ret) {
160 r = -ret;
161 td_verror(td, r, "sg_read");
5ad7be56 162 break;
5ad7be56 163 }
14d0261e
JA		 164 p += sizeof(struct sg_io_hdr);
165 events++;
166 dprint(FD_IO, "sgio_getevents: events: %d\n", events);
adee86c5
JA		 167 }
168 }
169
14d0261e 170 if (r < 0 && !events)
2866c82d 171 break;
adee86c5
JA		 172 if (!events) {
173 usleep(1000);
174 goto re_read;
175 }
2866c82d 176
2866c82d
JA		 177 left -= events;
178 r += events;
179
180 for (i = 0; i < events; i++) {
181 struct sg_io_hdr *hdr = (struct sg_io_hdr *) buf + i;
2866c82d 182 sd->events[i] = hdr->usr_ptr;
5ad7be56
KD		 183
184 /* record if an io error occurred, ignore resid */
185 if (hdr->info & SG_INFO_CHECK) {
186 struct io_u *io_u;
187 io_u = (struct io_u *)(hdr->usr_ptr);
188 memcpy((void*)&(io_u->hdr), (void*)hdr, sizeof(struct sg_io_hdr));
189 sd->events[i]->error = EIO;
190 }
2866c82d
JA		 191 }
192 }
193
adee86c5 194 if (!min) {
affe05a9 195 for_each_file(td, f, i) {
3a35845f
JA		 196 if (sd->fd_flags[i] == -1)
197 continue;
198
affe05a9
JA		 199 if (fcntl(f->fd, F_SETFL, sd->fd_flags[i]) < 0)
200 log_err("fio: sg failed to restore fcntl flags: %s\n", strerror(errno));
201 }
adee86c5 202 }
2866c82d 203
2866c82d
JA		 204 return r;
205}
206
7a16dd02
JA		 207static int fio_sgio_ioctl_doio(struct thread_data *td,
208 struct fio_file *f, struct io_u *io_u)
2866c82d
JA		 209{
210 struct sgio_data *sd = td->io_ops->data;
211 struct sg_io_hdr *hdr = &io_u->hdr;
36167d82 212 int ret;
2866c82d
JA		 213
214 sd->events[0] = io_u;
215
36167d82
JA		 216 ret = ioctl(f->fd, SG_IO, hdr);
217 if (ret < 0)
a05bd42d 218 return ret;
36167d82 219
5ad7be56
KD		 220 /* record if an io error occurred */
221 if (hdr->info & SG_INFO_CHECK)
222 io_u->error = EIO;
223
36167d82 224 return FIO_Q_COMPLETED;
2866c82d
JA		 225}
226
2b13e716 227static int fio_sgio_rw_doio(struct fio_file *f, struct io_u *io_u, int do_sync)
2866c82d
JA		 228{
229 struct sg_io_hdr *hdr = &io_u->hdr;
230 int ret;
231
53cdc686 232 ret = write(f->fd, hdr, sizeof(*hdr));
2866c82d 233 if (ret < 0)
a05bd42d 234 return ret;
2866c82d 235
2b13e716 236 if (do_sync) {
53cdc686 237 ret = read(f->fd, hdr, sizeof(*hdr));
2866c82d 238 if (ret < 0)
a05bd42d 239 return ret;
5ad7be56
KD		 240
241 /* record if an io error occurred */
242 if (hdr->info & SG_INFO_CHECK)
243 io_u->error = EIO;
244
36167d82 245 return FIO_Q_COMPLETED;
2866c82d
JA		 246 }
247
36167d82 248 return FIO_Q_QUEUED;
2866c82d
JA		 249}
250
2b13e716 251static int fio_sgio_doio(struct thread_data *td, struct io_u *io_u, int do_sync)
2866c82d 252{
53cdc686 253 struct fio_file *f = io_u->file;
5ad7be56 254 int ret;
53cdc686 255
5ad7be56
KD		 256 if (f->filetype == FIO_TYPE_BD) {
257 ret = fio_sgio_ioctl_doio(td, f, io_u);
258 td->error = io_u->error;
259 } else {
260 ret = fio_sgio_rw_doio(f, io_u, do_sync);
261 if (do_sync)
262 td->error = io_u->error;
263 }
2866c82d 264
5ad7be56 265 return ret;
2866c82d
JA		 266}
267
2866c82d
JA		 268static int fio_sgio_prep(struct thread_data *td, struct io_u *io_u)
269{
270 struct sg_io_hdr *hdr = &io_u->hdr;
271 struct sgio_data *sd = td->io_ops->data;
5ad7be56 272 long long nr_blocks, lba;
2866c82d 273
cec6b55d 274 if (io_u->xfer_buflen & (sd->bs - 1)) {
2866c82d
JA		 275 log_err("read/write not sector aligned\n");
276 return EINVAL;
277 }
278
5ad7be56
KD		 279 nr_blocks = io_u->xfer_buflen / sd->bs;
280 lba = io_u->offset / sd->bs;
281
2866c82d 282 if (io_u->ddir == DDIR_READ) {
87dc1ab1
JA		 283 sgio_hdr_init(sd, hdr, io_u, 1);
284
2866c82d 285 hdr->dxfer_direction = SG_DXFER_FROM_DEV;
5ad7be56
KD		 286 if (lba < MAX_10B_LBA)
287 hdr->cmdp[0] = 0x28; // read(10)
288 else
289 hdr->cmdp[0] = 0x88; // read(16)
87dc1ab1
JA		 290 } else if (io_u->ddir == DDIR_WRITE) {
291 sgio_hdr_init(sd, hdr, io_u, 1);
292
2866c82d 293 hdr->dxfer_direction = SG_DXFER_TO_DEV;
5ad7be56
KD		 294 if (lba < MAX_10B_LBA)
295 hdr->cmdp[0] = 0x2a; // write(10)
296 else
297 hdr->cmdp[0] = 0x8a; // write(16)
87dc1ab1
JA		 298 } else {
299 sgio_hdr_init(sd, hdr, io_u, 0);
87dc1ab1 300 hdr->dxfer_direction = SG_DXFER_NONE;
5ad7be56
KD		 301 if (lba < MAX_10B_LBA)
302 hdr->cmdp[0] = 0x35; // synccache(10)
303 else
304 hdr->cmdp[0] = 0x91; // synccache(16)
87dc1ab1
JA		 305 }
306
5ad7be56
KD		 307 /*
308 * for synccache, we leave lba and length to 0 to sync all
309 * blocks on medium.
310 */
87dc1ab1 311 if (hdr->dxfer_direction != SG_DXFER_NONE) {
5ad7be56
KD		 312
313 if (lba < MAX_10B_LBA) {
314 hdr->cmdp[2] = (unsigned char) ((lba >> 24) & 0xff);
315 hdr->cmdp[3] = (unsigned char) ((lba >> 16) & 0xff);
316 hdr->cmdp[4] = (unsigned char) ((lba >> 8) & 0xff);
317 hdr->cmdp[5] = (unsigned char) (lba & 0xff);
318 hdr->cmdp[7] = (unsigned char) ((nr_blocks >> 8) & 0xff);
319 hdr->cmdp[8] = (unsigned char) (nr_blocks & 0xff);
320 } else {
321 hdr->cmdp[2] = (unsigned char) ((lba >> 56) & 0xff);
322 hdr->cmdp[3] = (unsigned char) ((lba >> 48) & 0xff);
323 hdr->cmdp[4] = (unsigned char) ((lba >> 40) & 0xff);
324 hdr->cmdp[5] = (unsigned char) ((lba >> 32) & 0xff);
325 hdr->cmdp[6] = (unsigned char) ((lba >> 24) & 0xff);
326 hdr->cmdp[7] = (unsigned char) ((lba >> 16) & 0xff);
327 hdr->cmdp[8] = (unsigned char) ((lba >> 8) & 0xff);
328 hdr->cmdp[9] = (unsigned char) (lba & 0xff);
329 hdr->cmdp[10] = (unsigned char) ((nr_blocks >> 32) & 0xff);
330 hdr->cmdp[11] = (unsigned char) ((nr_blocks >> 16) & 0xff);
331 hdr->cmdp[12] = (unsigned char) ((nr_blocks >> 8) & 0xff);
332 hdr->cmdp[13] = (unsigned char) (nr_blocks & 0xff);
333 }
2866c82d
JA		 334 }
335
5ad7be56 336 hdr->timeout = SCSI_TIMEOUT_MS;
2866c82d
JA		 337 return 0;
338}
339
340static int fio_sgio_queue(struct thread_data *td, struct io_u *io_u)
341{
342 struct sg_io_hdr *hdr = &io_u->hdr;
f6db4fa5 343 int ret, do_sync = 0;
2866c82d 344
7101d9c2
JA		 345 fio_ro_check(td, io_u);
346
f6db4fa5
JA		 347 if (td->o.sync_io || td->o.odirect || ddir_sync(io_u->ddir))
348 do_sync = 1;
349
350 ret = fio_sgio_doio(td, io_u, do_sync);
2866c82d
JA		 351
352 if (ret < 0)
353 io_u->error = errno;
354 else if (hdr->status) {
355 io_u->resid = hdr->resid;
356 io_u->error = EIO;
357 }
358
95bcd815 359 if (io_u->error) {
e1161c32 360 td_verror(td, io_u->error, "xfer");
36167d82 361 return FIO_Q_COMPLETED;
95bcd815
JA		 362 }
363
36167d82 364 return ret;
2866c82d
JA		 365}
366
367static struct io_u *fio_sgio_event(struct thread_data *td, int event)
368{
369 struct sgio_data *sd = td->io_ops->data;
370
371 return sd->events[event];
372}
373
5ad7be56
KD		 374static int fio_sgio_read_capacity(struct thread_data *td, unsigned int *bs,
375 unsigned long long *max_lba)
2866c82d 376{
5ad7be56
KD		 377 /*
378 * need to do read capacity operation w/o benefit of sd or
379 * io_u structures, which are not initialized until later.
380 */
381 struct sg_io_hdr hdr;
382 unsigned char cmd[16];
383 unsigned char sb[64];
384 unsigned char buf[32]; // read capacity return
2866c82d 385 int ret;
5ad7be56 386 int fd = -1;
2866c82d 387
5ad7be56 388 struct fio_file *f = td->files[0];
2866c82d 389
5ad7be56
KD		 390 /* open file independent of rest of application */
391 fd = open(f->file_name, O_RDONLY);
392 if (fd < 0)
393 return -errno;
2866c82d 394
5ad7be56
KD		 395 memset(&hdr, 0, sizeof(hdr));
396 memset(cmd, 0, sizeof(cmd));
397 memset(sb, 0, sizeof(sb));
398 memset(buf, 0, sizeof(buf));
2866c82d 399
5ad7be56
KD		 400 /* First let's try a 10 byte read capacity. */
401 hdr.interface_id = 'S';
402 hdr.cmdp = cmd;
403 hdr.cmd_len = 10;
404 hdr.sbp = sb;
405 hdr.mx_sb_len = sizeof(sb);
406 hdr.timeout = SCSI_TIMEOUT_MS;
407 hdr.cmdp[0] = 0x25; // Read Capacity(10)
408 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
409 hdr.dxferp = buf;
410 hdr.dxfer_len = sizeof(buf);
411
412 ret = ioctl(fd, SG_IO, &hdr);
413 if (ret < 0) {
414 close(fd);
2866c82d 415 return ret;
5ad7be56 416 }
2866c82d 417
5ad7be56
KD		 418 *bs = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
419 *max_lba = ((buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]) & 0x00000000FFFFFFFFULL; // for some reason max_lba is being sign extended even though unsigned.
420
421
422 /*
423 * If max lba is 0xFFFFFFFF, then need to retry with
424 * 16 byteread capacity
425 */
426 if (*max_lba == MAX_10B_LBA) {
427 hdr.cmd_len = 16;
428 hdr.cmdp[0] = 0x9e; // Read Capacity(16)
429 hdr.cmdp[1] = 0x10; // service action
430 hdr.cmdp[10] = (unsigned char) ((sizeof(buf) >> 24) & 0xff);
431 hdr.cmdp[11] = (unsigned char) ((sizeof(buf) >> 16) & 0xff);
432 hdr.cmdp[12] = (unsigned char) ((sizeof(buf) >> 8) & 0xff);
433 hdr.cmdp[13] = (unsigned char) (sizeof(buf) & 0xff);
434
435 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
436 hdr.dxferp = buf;
437 hdr.dxfer_len = sizeof(buf);
438
439 ret = ioctl(fd, SG_IO, &hdr);
440 if (ret < 0) {
441 close(fd);
442 return ret;
443 }
444
445 /* record if an io error occurred */
446 if (hdr.info & SG_INFO_CHECK)
447 td_verror(td, EIO, "fio_sgio_read_capacity");
448
449 *bs = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11];
450 *max_lba = ((unsigned long long)buf[0] << 56) |
451 ((unsigned long long)buf[1] << 48) |
452 ((unsigned long long)buf[2] << 40) |
453 ((unsigned long long)buf[3] << 32) |
454 ((unsigned long long)buf[4] << 24) |
455 ((unsigned long long)buf[5] << 16) |
456 ((unsigned long long)buf[6] << 8) |
457 (unsigned long long)buf[7];
458 }
459
460 close(fd);
2866c82d
JA		 461 return 0;
462}
463
464static void fio_sgio_cleanup(struct thread_data *td)
465{
dc0deca2
JA		 466 struct sgio_data *sd = td->io_ops->data;
467
468 if (sd) {
469 free(sd->events);
470 free(sd->cmds);
471 free(sd->fd_flags);
472 free(sd->pfds);
473 free(sd->sgbuf);
474 free(sd);
2866c82d
JA		 475 }
476}
477
478static int fio_sgio_init(struct thread_data *td)
479{
480 struct sgio_data *sd;
2866c82d
JA		 481
482 sd = malloc(sizeof(*sd));
cb781c75 483 memset(sd, 0, sizeof(*sd));
2dc1bbeb
JA		 484 sd->cmds = malloc(td->o.iodepth * sizeof(struct sgio_cmd));
485 memset(sd->cmds, 0, td->o.iodepth * sizeof(struct sgio_cmd));
486 sd->events = malloc(td->o.iodepth * sizeof(struct io_u *));
487 memset(sd->events, 0, td->o.iodepth * sizeof(struct io_u *));
488 sd->pfds = malloc(sizeof(struct pollfd) * td->o.nr_files);
489 memset(sd->pfds, 0, sizeof(struct pollfd) * td->o.nr_files);
490 sd->fd_flags = malloc(sizeof(int) * td->o.nr_files);
491 memset(sd->fd_flags, 0, sizeof(int) * td->o.nr_files);
492 sd->sgbuf = malloc(sizeof(struct sg_io_hdr) * td->o.iodepth);
493 memset(sd->sgbuf, 0, sizeof(struct sg_io_hdr) * td->o.iodepth);
5ad7be56 494 sd->type_checked = 0;
2866c82d
JA		 495 td->io_ops->data = sd;
496
b5af8293
JA		 497 /*
498 * we want to do it, regardless of whether odirect is set or not
499 */
2dc1bbeb 500 td->o.override_sync = 1;
b5af8293
JA		 501 return 0;
502}
503
504static int fio_sgio_type_check(struct thread_data *td, struct fio_file *f)
505{
506 struct sgio_data *sd = td->io_ops->data;
5ad7be56
KD		 507 unsigned int bs = 0;
508 unsigned long long max_lba = 0;
509
b5af8293 510
af52b345 511 if (f->filetype == FIO_TYPE_BD) {
53cdc686 512 if (ioctl(f->fd, BLKSSZGET, &bs) < 0) {
e1161c32 513 td_verror(td, errno, "ioctl");
b5af8293 514 return 1;
2866c82d 515 }
af52b345 516 } else if (f->filetype == FIO_TYPE_CHAR) {
b5af8293 517 int version, ret;
2866c82d 518
53cdc686 519 if (ioctl(f->fd, SG_GET_VERSION_NUM, &version) < 0) {
e1161c32 520 td_verror(td, errno, "ioctl");
b5af8293 521 return 1;
2866c82d
JA		 522 }
523
5ad7be56
KD		 524 ret = fio_sgio_read_capacity(td, &bs, &max_lba);
525 if (ret) {
526 td_verror(td, td->error, "fio_sgio_read_capacity");
527 log_err("ioengine sg unable to read capacity successfully\n");
b5af8293 528 return 1;
5ad7be56 529 }
2866c82d 530 } else {
16ada754 531 td_verror(td, EINVAL, "wrong file type");
d0c70934 532 log_err("ioengine sg only works on block devices\n");
b5af8293 533 return 1;
2866c82d
JA		 534 }
535
536 sd->bs = bs;
5ad7be56
KD		 537 // Determine size of commands needed based on max_lba
538 sd->max_lba = max_lba;
539 if (max_lba > MAX_10B_LBA) {
540 dprint(FD_IO, "sgio_type_check: using 16 byte operations: max_lba = 0x%016llx\n", max_lba);
541 }
542
2866c82d 543
af52b345 544 if (f->filetype == FIO_TYPE_BD) {
36167d82
JA		 545 td->io_ops->getevents = NULL;
546 td->io_ops->event = NULL;
547 }
5ad7be56 548 sd->type_checked = 1;
2866c82d 549
2866c82d 550 return 0;
b5af8293
JA		 551}
552
553static int fio_sgio_open(struct thread_data *td, struct fio_file *f)
554{
555 struct sgio_data *sd = td->io_ops->data;
556 int ret;
557
558 ret = generic_open_file(td, f);
559 if (ret)
560 return ret;
561
15ba640a 562 if (sd && !sd->type_checked && fio_sgio_type_check(td, f)) {
6977bcd0 563 ret = generic_close_file(td, f);
b5af8293
JA		 564 return 1;
565 }
566
567 return 0;
2866c82d
JA		 568}
569
5ad7be56
KD		 570/*
571 * Build an error string with details about the driver, host or scsi
572 * error contained in the sg header Caller will use as necessary.
573 */
574static char *fio_sgio_errdetails(struct io_u *io_u)
575{
576 struct sg_io_hdr *hdr = &io_u->hdr;
577#define MAXERRDETAIL 1024
578#define MAXMSGCHUNK 128
579 char *msg, msgchunk[MAXMSGCHUNK], *ret = NULL;
580 int i;
581
582 msg = calloc(MAXERRDETAIL, 1);
583
584 /*
585 * can't seem to find sg_err.h, so I'll just echo the define values
586 * so others can search on internet to find clearer clues of meaning.
587 */
588 if (hdr->info & SG_INFO_CHECK) {
589 ret = msg;
590 if (hdr->host_status) {
591 snprintf(msgchunk, MAXMSGCHUNK, "SG Host Status: 0x%02x; ", hdr->host_status);
592 strlcat(msg, msgchunk, MAXERRDETAIL);
593 switch (hdr->host_status) {
594 case 0x01:
595 strlcat(msg, "SG_ERR_DID_NO_CONNECT", MAXERRDETAIL);
596 break;
597 case 0x02:
598 strlcat(msg, "SG_ERR_DID_BUS_BUSY", MAXERRDETAIL);
599 break;
600 case 0x03:
601 strlcat(msg, "SG_ERR_DID_TIME_OUT", MAXERRDETAIL);
602 break;
603 case 0x04:
604 strlcat(msg, "SG_ERR_DID_BAD_TARGET", MAXERRDETAIL);
605 break;
606 case 0x05:
607 strlcat(msg, "SG_ERR_DID_ABORT", MAXERRDETAIL);
608 break;
609 case 0x06:
610 strlcat(msg, "SG_ERR_DID_PARITY", MAXERRDETAIL);
611 break;
612 case 0x07:
613 strlcat(msg, "SG_ERR_DID_ERROR (internal error)", MAXERRDETAIL);
614 break;
615 case 0x08:
616 strlcat(msg, "SG_ERR_DID_RESET", MAXERRDETAIL);
617 break;
618 case 0x09:
619 strlcat(msg, "SG_ERR_DID_BAD_INTR (unexpected)", MAXERRDETAIL);
620 break;
621 case 0x0a:
622 strlcat(msg, "SG_ERR_DID_PASSTHROUGH", MAXERRDETAIL);
623 break;
624 case 0x0b:
625 strlcat(msg, "SG_ERR_DID_SOFT_ERROR (driver retry?)", MAXERRDETAIL);
626 break;
627 case 0x0c:
628 strlcat(msg, "SG_ERR_DID_IMM_RETRY", MAXERRDETAIL);
629 break;
630 case 0x0d:
631 strlcat(msg, "SG_ERR_DID_REQUEUE", MAXERRDETAIL);
632 break;
633 default:
634 strlcat(msg, "Unknown", MAXERRDETAIL);
635 break;
636 }
637 strlcat(msg, ". ", MAXERRDETAIL);
638 }
639 if (hdr->driver_status) {
640 snprintf(msgchunk, MAXMSGCHUNK, "SG Driver Status: 0x%02x; ", hdr->driver_status);
641 strlcat(msg, msgchunk, MAXERRDETAIL);
642 switch (hdr->driver_status & 0x0F) {
643 case 0x01:
644 strlcat(msg, "SG_ERR_DRIVER_BUSY", MAXERRDETAIL);
645 break;
646 case 0x02:
647 strlcat(msg, "SG_ERR_DRIVER_SOFT", MAXERRDETAIL);
648 break;
649 case 0x03:
650 strlcat(msg, "SG_ERR_DRIVER_MEDIA", MAXERRDETAIL);
651 break;
652 case 0x04:
653 strlcat(msg, "SG_ERR_DRIVER_ERROR", MAXERRDETAIL);
654 break;
655 case 0x05:
656 strlcat(msg, "SG_ERR_DRIVER_INVALID", MAXERRDETAIL);
657 break;
658 case 0x06:
659 strlcat(msg, "SG_ERR_DRIVER_TIMEOUT", MAXERRDETAIL);
660 break;
661 case 0x07:
662 strlcat(msg, "SG_ERR_DRIVER_HARD", MAXERRDETAIL);
663 break;
664 case 0x08:
665 strlcat(msg, "SG_ERR_DRIVER_SENSE", MAXERRDETAIL);
666 break;
667 default:
668 strlcat(msg, "Unknown", MAXERRDETAIL);
669 break;
670 }
671 strlcat(msg, "; ", MAXERRDETAIL);
672 switch (hdr->driver_status & 0xF0) {
673 case 0x10:
674 strlcat(msg, "SG_ERR_SUGGEST_RETRY", MAXERRDETAIL);
675 break;
676 case 0x20:
677 strlcat(msg, "SG_ERR_SUGGEST_ABORT", MAXERRDETAIL);
678 break;
679 case 0x30:
680 strlcat(msg, "SG_ERR_SUGGEST_REMAP", MAXERRDETAIL);
681 break;
682 case 0x40:
683 strlcat(msg, "SG_ERR_SUGGEST_DIE", MAXERRDETAIL);
684 break;
685 case 0x80:
686 strlcat(msg, "SG_ERR_SUGGEST_SENSE", MAXERRDETAIL);
687 break;
688 }
689 strlcat(msg, ". ", MAXERRDETAIL);
690 }
691 if (hdr->status) {
692 snprintf(msgchunk, MAXMSGCHUNK, "SG SCSI Status: 0x%02x; ", hdr->status);
693 strlcat(msg, msgchunk, MAXERRDETAIL);
694 // SCSI 3 status codes
695 switch (hdr->status) {
696 case 0x02:
697 strlcat(msg, "CHECK_CONDITION", MAXERRDETAIL);
698 break;
699 case 0x04:
700 strlcat(msg, "CONDITION_MET", MAXERRDETAIL);
701 break;
702 case 0x08:
703 strlcat(msg, "BUSY", MAXERRDETAIL);
704 break;
705 case 0x10:
706 strlcat(msg, "INTERMEDIATE", MAXERRDETAIL);
707 break;
708 case 0x14:
709 strlcat(msg, "INTERMEDIATE_CONDITION_MET", MAXERRDETAIL);
710 break;
711 case 0x18:
712 strlcat(msg, "RESERVATION_CONFLICT", MAXERRDETAIL);
713 break;
714 case 0x22:
715 strlcat(msg, "COMMAND_TERMINATED", MAXERRDETAIL);
716 break;
717 case 0x28:
718 strlcat(msg, "TASK_SET_FULL", MAXERRDETAIL);
719 break;
720 case 0x30:
721 strlcat(msg, "ACA_ACTIVE", MAXERRDETAIL);
722 break;
723 case 0x40:
724 strlcat(msg, "TASK_ABORTED", MAXERRDETAIL);
725 break;
726 default:
727 strlcat(msg, "Unknown", MAXERRDETAIL);
728 break;
729 }
730 strlcat(msg, ". ", MAXERRDETAIL);
731 }
732 if (hdr->sb_len_wr) {
733 snprintf(msgchunk, MAXMSGCHUNK, "Sense Data (%d bytes):", hdr->sb_len_wr);
734 strlcat(msg, msgchunk, MAXERRDETAIL);
735 for (i = 0; i < hdr->sb_len_wr; i++) {
736 snprintf(msgchunk, MAXMSGCHUNK, " %02x", hdr->sbp[i]);
737 strlcat(msg, msgchunk, MAXERRDETAIL);
738 }
739 strlcat(msg, ". ", MAXERRDETAIL);
740 }
741 if (hdr->resid != 0) {
742 snprintf(msgchunk, MAXMSGCHUNK, "SG Driver: %d bytes out of %d not transferred. ", hdr->resid, hdr->dxfer_len);
743 strlcat(msg, msgchunk, MAXERRDETAIL);
744 ret = msg;
745 }
746 }
747
748 if (!ret)
749 ret = strdup("SG Driver did not report a Host, Driver or Device check");
750
751 return ret;
752}
753
754/*
755 * get max file size from read capacity.
756 */
757static int fio_sgio_get_file_size(struct thread_data *td, struct fio_file *f)
758{
759 /*
760 * get_file_size is being called even before sgio_init is
761 * called, so none of the sg_io structures are
762 * initialized in the thread_data yet. So we need to do the
763 * ReadCapacity without any of those helpers. One of the effects
764 * is that ReadCapacity may get called 4 times on each open:
765 * readcap(10) followed by readcap(16) if needed - just to get
766 * the file size after the init occurs - it will be called
767 * again when "type_check" is called during structure
768 * initialization I'm not sure how to prevent this little
769 * inefficiency.
770 */
771 unsigned int bs = 0;
772 unsigned long long max_lba = 0;
773 int ret;
774
775 if (fio_file_size_known(f))
776 return 0;
777
778 ret = fio_sgio_read_capacity(td, &bs, &max_lba);
779 if (ret ) {
780 td_verror(td, td->error, "fio_sgio_read_capacity");
781 log_err("ioengine sg unable to successfully execute read capacity to get block size and maximum lba\n");
782 return 1;
783 }
784
785 f->real_file_size = (max_lba + 1) * bs;
786 fio_file_set_size_known(f);
787 return 0;
788}
789
790
5f350952 791static struct ioengine_ops ioengine = {
2866c82d
JA		 792 .name = "sg",
793 .version = FIO_IOOPS_VERSION,
794 .init = fio_sgio_init,
795 .prep = fio_sgio_prep,
796 .queue = fio_sgio_queue,
797 .getevents = fio_sgio_getevents,
5ad7be56 798 .errdetails = fio_sgio_errdetails,
2866c82d
JA		 799 .event = fio_sgio_event,
800 .cleanup = fio_sgio_cleanup,
b5af8293
JA		 801 .open_file = fio_sgio_open,
802 .close_file = generic_close_file,
5ad7be56 803 .get_file_size = fio_sgio_get_file_size, // generic_get_file_size
b2a15192 804 .flags = FIO_SYNCIO | FIO_RAWIO,
2866c82d 805};
34cfcdaf
JA		 806
807#else /* FIO_HAVE_SGIO */
808
809/*
810 * When we have a proper configure system in place, we simply wont build
811 * and install this io engine. For now install a crippled version that
812 * just complains and fails to load.
813 */
814static int fio_sgio_init(struct thread_data fio_unused *td)
815{
a3edaf76 816 log_err("fio: ioengine sg not available\n");
34cfcdaf
JA		 817 return 1;
818}
819
5f350952 820static struct ioengine_ops ioengine = {
d0c70934 821 .name = "sg",
34cfcdaf
JA		 822 .version = FIO_IOOPS_VERSION,
823 .init = fio_sgio_init,
824};
825
826#endif
5f350952
JA		 827
828static void fio_init fio_sgio_register(void)
829{
830 register_ioengine(&ioengine);
831}
832
833static void fio_exit fio_sgio_unregister(void)
834{
835 unregister_ioengine(&ioengine);
836}
fio - Flexible IO Tester