Commit | Line | Data |
---|---|---|
2866c82d JA |
1 | /* |
2 | * scsi generic sg v3 io engine | |
3 | * | |
4 | */ | |
5 | #include <stdio.h> | |
6 | #include <stdlib.h> | |
7 | #include <unistd.h> | |
8 | #include <errno.h> | |
9 | #include <assert.h> | |
10 | #include <sys/poll.h> | |
5f350952 JA |
11 | |
12 | #include "../fio.h" | |
13 | #include "../os.h" | |
2866c82d | 14 | |
34cfcdaf JA |
15 | #ifdef FIO_HAVE_SGIO |
16 | ||
2866c82d JA |
17 | struct sgio_cmd { |
18 | unsigned char cdb[10]; | |
19 | int nr; | |
20 | }; | |
21 | ||
22 | struct sgio_data { | |
23 | struct sgio_cmd *cmds; | |
24 | struct io_u **events; | |
25 | unsigned int bs; | |
26 | }; | |
27 | ||
28 | static void sgio_hdr_init(struct sgio_data *sd, struct sg_io_hdr *hdr, | |
29 | struct io_u *io_u, int fs) | |
30 | { | |
31 | struct sgio_cmd *sc = &sd->cmds[io_u->index]; | |
32 | ||
33 | memset(hdr, 0, sizeof(*hdr)); | |
34 | memset(sc->cdb, 0, sizeof(sc->cdb)); | |
35 | ||
36 | hdr->interface_id = 'S'; | |
37 | hdr->cmdp = sc->cdb; | |
38 | hdr->cmd_len = sizeof(sc->cdb); | |
39 | hdr->pack_id = io_u->index; | |
40 | hdr->usr_ptr = io_u; | |
41 | ||
42 | if (fs) { | |
43 | hdr->dxferp = io_u->buf; | |
44 | hdr->dxfer_len = io_u->buflen; | |
45 | } | |
46 | } | |
47 | ||
48 | static int fio_sgio_ioctl_getevents(struct thread_data *td, int fio_unused min, | |
49 | int max, struct timespec fio_unused *t) | |
50 | { | |
51 | assert(max <= 1); | |
52 | ||
53 | /* | |
54 | * we can only have one finished io_u for sync io, since the depth | |
55 | * is always 1 | |
56 | */ | |
57 | if (list_empty(&td->io_u_busylist)) | |
58 | return 0; | |
59 | ||
60 | return 1; | |
61 | } | |
62 | ||
63 | ||
64 | static int fio_sgio_getevents(struct thread_data *td, int min, int max, | |
65 | struct timespec fio_unused *t) | |
66 | { | |
53cdc686 | 67 | struct fio_file *f = &td->files[0]; |
2866c82d | 68 | struct sgio_data *sd = td->io_ops->data; |
53cdc686 | 69 | struct pollfd pfd = { .fd = f->fd, .events = POLLIN }; |
2866c82d JA |
70 | void *buf = malloc(max * sizeof(struct sg_io_hdr)); |
71 | int left = max, ret, events, i, r = 0, fl = 0; | |
72 | ||
73 | /* | |
74 | * don't block for !events | |
75 | */ | |
76 | if (!min) { | |
53cdc686 JA |
77 | fl = fcntl(f->fd, F_GETFL); |
78 | fcntl(f->fd, F_SETFL, fl | O_NONBLOCK); | |
2866c82d JA |
79 | } |
80 | ||
81 | while (left) { | |
82 | do { | |
83 | if (!min) | |
84 | break; | |
85 | poll(&pfd, 1, -1); | |
86 | if (pfd.revents & POLLIN) | |
87 | break; | |
88 | } while (1); | |
89 | ||
53cdc686 | 90 | ret = read(f->fd, buf, left * sizeof(struct sg_io_hdr)); |
2866c82d JA |
91 | if (ret < 0) { |
92 | if (errno == EAGAIN) | |
93 | break; | |
94 | td_verror(td, errno); | |
95 | r = -1; | |
96 | break; | |
97 | } else if (!ret) | |
98 | break; | |
99 | ||
100 | events = ret / sizeof(struct sg_io_hdr); | |
101 | left -= events; | |
102 | r += events; | |
103 | ||
104 | for (i = 0; i < events; i++) { | |
105 | struct sg_io_hdr *hdr = (struct sg_io_hdr *) buf + i; | |
106 | ||
107 | sd->events[i] = hdr->usr_ptr; | |
108 | } | |
109 | } | |
110 | ||
111 | if (!min) | |
53cdc686 | 112 | fcntl(f->fd, F_SETFL, fl); |
2866c82d JA |
113 | |
114 | free(buf); | |
115 | return r; | |
116 | } | |
117 | ||
7a16dd02 JA |
118 | static int fio_sgio_ioctl_doio(struct thread_data *td, |
119 | struct fio_file *f, struct io_u *io_u) | |
2866c82d JA |
120 | { |
121 | struct sgio_data *sd = td->io_ops->data; | |
122 | struct sg_io_hdr *hdr = &io_u->hdr; | |
123 | ||
124 | sd->events[0] = io_u; | |
125 | ||
53cdc686 | 126 | return ioctl(f->fd, SG_IO, hdr); |
2866c82d JA |
127 | } |
128 | ||
7a16dd02 | 129 | static int fio_sgio_rw_doio(struct fio_file *f, struct io_u *io_u, int sync) |
2866c82d JA |
130 | { |
131 | struct sg_io_hdr *hdr = &io_u->hdr; | |
132 | int ret; | |
133 | ||
53cdc686 | 134 | ret = write(f->fd, hdr, sizeof(*hdr)); |
2866c82d JA |
135 | if (ret < 0) |
136 | return errno; | |
137 | ||
138 | if (sync) { | |
53cdc686 | 139 | ret = read(f->fd, hdr, sizeof(*hdr)); |
2866c82d JA |
140 | if (ret < 0) |
141 | return errno; | |
142 | } | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | static int fio_sgio_doio(struct thread_data *td, struct io_u *io_u, int sync) | |
148 | { | |
53cdc686 JA |
149 | struct fio_file *f = io_u->file; |
150 | ||
2866c82d | 151 | if (td->filetype == FIO_TYPE_BD) |
53cdc686 | 152 | return fio_sgio_ioctl_doio(td, f, io_u); |
2866c82d | 153 | |
7a16dd02 | 154 | return fio_sgio_rw_doio(f, io_u, sync); |
2866c82d JA |
155 | } |
156 | ||
2866c82d JA |
157 | static int fio_sgio_prep(struct thread_data *td, struct io_u *io_u) |
158 | { | |
159 | struct sg_io_hdr *hdr = &io_u->hdr; | |
160 | struct sgio_data *sd = td->io_ops->data; | |
161 | int nr_blocks, lba; | |
162 | ||
163 | if (io_u->buflen & (sd->bs - 1)) { | |
164 | log_err("read/write not sector aligned\n"); | |
165 | return EINVAL; | |
166 | } | |
167 | ||
2866c82d | 168 | if (io_u->ddir == DDIR_READ) { |
87dc1ab1 JA |
169 | sgio_hdr_init(sd, hdr, io_u, 1); |
170 | ||
2866c82d JA |
171 | hdr->dxfer_direction = SG_DXFER_FROM_DEV; |
172 | hdr->cmdp[0] = 0x28; | |
87dc1ab1 JA |
173 | } else if (io_u->ddir == DDIR_WRITE) { |
174 | sgio_hdr_init(sd, hdr, io_u, 1); | |
175 | ||
2866c82d JA |
176 | hdr->dxfer_direction = SG_DXFER_TO_DEV; |
177 | hdr->cmdp[0] = 0x2a; | |
87dc1ab1 JA |
178 | } else { |
179 | sgio_hdr_init(sd, hdr, io_u, 0); | |
180 | ||
181 | hdr->dxfer_direction = SG_DXFER_NONE; | |
182 | hdr->cmdp[0] = 0x35; | |
183 | } | |
184 | ||
185 | if (hdr->dxfer_direction != SG_DXFER_NONE) { | |
186 | nr_blocks = io_u->buflen / sd->bs; | |
187 | lba = io_u->offset / sd->bs; | |
188 | hdr->cmdp[2] = (lba >> 24) & 0xff; | |
189 | hdr->cmdp[3] = (lba >> 16) & 0xff; | |
190 | hdr->cmdp[4] = (lba >> 8) & 0xff; | |
191 | hdr->cmdp[5] = lba & 0xff; | |
192 | hdr->cmdp[7] = (nr_blocks >> 8) & 0xff; | |
193 | hdr->cmdp[8] = nr_blocks & 0xff; | |
2866c82d JA |
194 | } |
195 | ||
2866c82d JA |
196 | return 0; |
197 | } | |
198 | ||
199 | static int fio_sgio_queue(struct thread_data *td, struct io_u *io_u) | |
200 | { | |
201 | struct sg_io_hdr *hdr = &io_u->hdr; | |
202 | int ret; | |
203 | ||
87dc1ab1 | 204 | ret = fio_sgio_doio(td, io_u, io_u->ddir == DDIR_SYNC); |
2866c82d JA |
205 | |
206 | if (ret < 0) | |
207 | io_u->error = errno; | |
208 | else if (hdr->status) { | |
209 | io_u->resid = hdr->resid; | |
210 | io_u->error = EIO; | |
211 | } | |
212 | ||
213 | return io_u->error; | |
214 | } | |
215 | ||
216 | static struct io_u *fio_sgio_event(struct thread_data *td, int event) | |
217 | { | |
218 | struct sgio_data *sd = td->io_ops->data; | |
219 | ||
220 | return sd->events[event]; | |
221 | } | |
222 | ||
223 | static int fio_sgio_get_bs(struct thread_data *td, unsigned int *bs) | |
224 | { | |
225 | struct sgio_data *sd = td->io_ops->data; | |
226 | struct io_u *io_u; | |
227 | struct sg_io_hdr *hdr; | |
228 | unsigned char buf[8]; | |
229 | int ret; | |
230 | ||
231 | io_u = __get_io_u(td); | |
232 | assert(io_u); | |
233 | ||
234 | hdr = &io_u->hdr; | |
235 | sgio_hdr_init(sd, hdr, io_u, 0); | |
236 | memset(buf, 0, sizeof(buf)); | |
237 | ||
238 | hdr->cmdp[0] = 0x25; | |
239 | hdr->dxfer_direction = SG_DXFER_FROM_DEV; | |
240 | hdr->dxferp = buf; | |
241 | hdr->dxfer_len = sizeof(buf); | |
242 | ||
243 | ret = fio_sgio_doio(td, io_u, 1); | |
244 | if (ret) { | |
245 | put_io_u(td, io_u); | |
246 | return ret; | |
247 | } | |
248 | ||
249 | *bs = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; | |
250 | put_io_u(td, io_u); | |
251 | return 0; | |
252 | } | |
253 | ||
254 | static void fio_sgio_cleanup(struct thread_data *td) | |
255 | { | |
256 | if (td->io_ops->data) { | |
257 | free(td->io_ops->data); | |
258 | td->io_ops->data = NULL; | |
259 | } | |
260 | } | |
261 | ||
262 | static int fio_sgio_init(struct thread_data *td) | |
263 | { | |
53cdc686 | 264 | struct fio_file *f = &td->files[0]; |
2866c82d JA |
265 | struct sgio_data *sd; |
266 | unsigned int bs; | |
267 | int ret; | |
268 | ||
269 | sd = malloc(sizeof(*sd)); | |
cb781c75 | 270 | memset(sd, 0, sizeof(*sd)); |
2866c82d | 271 | sd->cmds = malloc(td->iodepth * sizeof(struct sgio_cmd)); |
cb781c75 | 272 | memset(sd->cmds, 0, td->iodepth * sizeof(struct sgio_cmd)); |
2866c82d | 273 | sd->events = malloc(td->iodepth * sizeof(struct io_u *)); |
cb781c75 | 274 | memset(sd->events, 0, td->iodepth * sizeof(struct io_u *)); |
2866c82d JA |
275 | td->io_ops->data = sd; |
276 | ||
277 | if (td->filetype == FIO_TYPE_BD) { | |
53cdc686 | 278 | if (ioctl(f->fd, BLKSSZGET, &bs) < 0) { |
2866c82d | 279 | td_verror(td, errno); |
cb781c75 | 280 | goto err; |
2866c82d JA |
281 | } |
282 | } else if (td->filetype == FIO_TYPE_CHAR) { | |
283 | int version; | |
284 | ||
53cdc686 | 285 | if (ioctl(f->fd, SG_GET_VERSION_NUM, &version) < 0) { |
2866c82d | 286 | td_verror(td, errno); |
cb781c75 | 287 | goto err; |
2866c82d JA |
288 | } |
289 | ||
290 | ret = fio_sgio_get_bs(td, &bs); | |
291 | if (ret) | |
cb781c75 | 292 | goto err; |
2866c82d JA |
293 | } else { |
294 | log_err("ioengine sgio only works on block devices\n"); | |
cb781c75 | 295 | goto err; |
2866c82d JA |
296 | } |
297 | ||
298 | sd->bs = bs; | |
299 | ||
300 | if (td->filetype == FIO_TYPE_BD) | |
301 | td->io_ops->getevents = fio_sgio_ioctl_getevents; | |
302 | else | |
303 | td->io_ops->getevents = fio_sgio_getevents; | |
304 | ||
305 | /* | |
306 | * we want to do it, regardless of whether odirect is set or not | |
307 | */ | |
308 | td->override_sync = 1; | |
309 | return 0; | |
cb781c75 JA |
310 | err: |
311 | free(sd->events); | |
312 | free(sd->cmds); | |
313 | free(sd); | |
314 | return 1; | |
2866c82d JA |
315 | } |
316 | ||
5f350952 | 317 | static struct ioengine_ops ioengine = { |
2866c82d JA |
318 | .name = "sg", |
319 | .version = FIO_IOOPS_VERSION, | |
320 | .init = fio_sgio_init, | |
321 | .prep = fio_sgio_prep, | |
322 | .queue = fio_sgio_queue, | |
323 | .getevents = fio_sgio_getevents, | |
324 | .event = fio_sgio_event, | |
325 | .cleanup = fio_sgio_cleanup, | |
b2a15192 | 326 | .flags = FIO_SYNCIO | FIO_RAWIO, |
2866c82d | 327 | }; |
34cfcdaf JA |
328 | |
329 | #else /* FIO_HAVE_SGIO */ | |
330 | ||
331 | /* | |
332 | * When we have a proper configure system in place, we simply wont build | |
333 | * and install this io engine. For now install a crippled version that | |
334 | * just complains and fails to load. | |
335 | */ | |
336 | static int fio_sgio_init(struct thread_data fio_unused *td) | |
337 | { | |
338 | fprintf(stderr, "fio: sgio not available\n"); | |
339 | return 1; | |
340 | } | |
341 | ||
5f350952 | 342 | static struct ioengine_ops ioengine = { |
34cfcdaf JA |
343 | .name = "sgio", |
344 | .version = FIO_IOOPS_VERSION, | |
345 | .init = fio_sgio_init, | |
346 | }; | |
347 | ||
348 | #endif | |
5f350952 JA |
349 | |
350 | static void fio_init fio_sgio_register(void) | |
351 | { | |
352 | register_ioengine(&ioengine); | |
353 | } | |
354 | ||
355 | static void fio_exit fio_sgio_unregister(void) | |
356 | { | |
357 | unregister_ioengine(&ioengine); | |
358 | } |