Commit | Line | Data |
---|---|---|
2866c82d | 1 | /* |
a31041ea | 2 | * sync/psync engine |
da751ca9 JA |
3 | * |
4 | * IO engine that does regular read(2)/write(2) with lseek(2) to transfer | |
a31041ea | 5 | * data and IO engine that does regular pread(2)/pwrite(2) to transfer data. |
2866c82d JA |
6 | * |
7 | */ | |
8 | #include <stdio.h> | |
9 | #include <stdlib.h> | |
10 | #include <unistd.h> | |
5921e80c | 11 | #include <sys/uio.h> |
2866c82d JA |
12 | #include <errno.h> |
13 | #include <assert.h> | |
5f350952 JA |
14 | |
15 | #include "../fio.h" | |
2866c82d | 16 | |
ef5f5a3a JA |
17 | /* |
18 | * Sync engine uses engine_data to store last offset | |
19 | */ | |
20 | #define LAST_POS(f) ((f)->engine_data) | |
21 | ||
1d2af02a JA |
22 | struct syncio_data { |
23 | struct iovec *iovecs; | |
24 | struct io_u **io_us; | |
25 | unsigned int queued; | |
e51cf72c | 26 | unsigned int events; |
1d2af02a JA |
27 | unsigned long queued_bytes; |
28 | ||
29 | unsigned long long last_offset; | |
30 | struct fio_file *last_file; | |
31 | enum fio_ddir last_ddir; | |
32 | }; | |
33 | ||
2866c82d JA |
34 | static int fio_syncio_prep(struct thread_data *td, struct io_u *io_u) |
35 | { | |
53cdc686 JA |
36 | struct fio_file *f = io_u->file; |
37 | ||
ff58fced | 38 | if (!ddir_rw(io_u->ddir)) |
87dc1ab1 JA |
39 | return 0; |
40 | ||
ef5f5a3a | 41 | if (LAST_POS(f) != -1ULL && LAST_POS(f) == io_u->offset) |
e943b878 JA |
42 | return 0; |
43 | ||
53cdc686 | 44 | if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) { |
e1161c32 | 45 | td_verror(td, errno, "lseek"); |
2866c82d JA |
46 | return 1; |
47 | } | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
2bd3eabc | 52 | static int fio_io_end(struct thread_data *td, struct io_u *io_u, int ret) |
2866c82d | 53 | { |
ff58fced | 54 | if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir)) |
ef5f5a3a | 55 | LAST_POS(io_u->file) = io_u->offset + ret; |
e943b878 | 56 | |
cec6b55d | 57 | if (ret != (int) io_u->xfer_buflen) { |
22819ec2 | 58 | if (ret >= 0) { |
cec6b55d JA |
59 | io_u->resid = io_u->xfer_buflen - ret; |
60 | io_u->error = 0; | |
36167d82 | 61 | return FIO_Q_COMPLETED; |
2866c82d JA |
62 | } else |
63 | io_u->error = errno; | |
64 | } | |
65 | ||
36167d82 | 66 | if (io_u->error) |
e1161c32 | 67 | td_verror(td, io_u->error, "xfer"); |
2866c82d | 68 | |
36167d82 | 69 | return FIO_Q_COMPLETED; |
2866c82d JA |
70 | } |
71 | ||
2bd3eabc | 72 | static int fio_psyncio_queue(struct thread_data *td, struct io_u *io_u) |
a31041ea | 73 | { |
2bd3eabc JA |
74 | struct fio_file *f = io_u->file; |
75 | int ret; | |
76 | ||
77 | fio_ro_check(td, io_u); | |
78 | ||
79 | if (io_u->ddir == DDIR_READ) | |
80 | ret = pread(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); | |
81 | else if (io_u->ddir == DDIR_WRITE) | |
82 | ret = pwrite(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); | |
6eaf09d6 SL |
83 | else if (io_u->ddir == DDIR_TRIM) { |
84 | do_io_u_trim(td, io_u); | |
85 | return FIO_Q_COMPLETED; | |
86 | } else | |
0a28ecda | 87 | ret = do_io_u_sync(td, io_u); |
2bd3eabc JA |
88 | |
89 | return fio_io_end(td, io_u, ret); | |
90 | } | |
91 | ||
92 | static int fio_syncio_queue(struct thread_data *td, struct io_u *io_u) | |
93 | { | |
94 | struct fio_file *f = io_u->file; | |
95 | int ret; | |
96 | ||
97 | fio_ro_check(td, io_u); | |
98 | ||
99 | if (io_u->ddir == DDIR_READ) | |
100 | ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen); | |
101 | else if (io_u->ddir == DDIR_WRITE) | |
102 | ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen); | |
6eaf09d6 SL |
103 | else if (io_u->ddir == DDIR_TRIM) { |
104 | do_io_u_trim(td, io_u); | |
105 | return FIO_Q_COMPLETED; | |
106 | } else | |
0a28ecda | 107 | ret = do_io_u_sync(td, io_u); |
2bd3eabc JA |
108 | |
109 | return fio_io_end(td, io_u, ret); | |
a31041ea | 110 | } |
111 | ||
1d2af02a JA |
112 | static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min, |
113 | unsigned int max, | |
114 | struct timespec fio_unused *t) | |
115 | { | |
116 | struct syncio_data *sd = td->io_ops->data; | |
117 | int ret; | |
118 | ||
119 | if (min) { | |
e51cf72c JA |
120 | ret = sd->events; |
121 | sd->events = 0; | |
1d2af02a JA |
122 | } else |
123 | ret = 0; | |
124 | ||
125 | dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret); | |
126 | return ret; | |
127 | } | |
128 | ||
129 | static struct io_u *fio_vsyncio_event(struct thread_data *td, int event) | |
130 | { | |
131 | struct syncio_data *sd = td->io_ops->data; | |
132 | ||
133 | return sd->io_us[event]; | |
134 | } | |
135 | ||
136 | static int fio_vsyncio_append(struct thread_data *td, struct io_u *io_u) | |
137 | { | |
138 | struct syncio_data *sd = td->io_ops->data; | |
139 | ||
5f9099ea | 140 | if (ddir_sync(io_u->ddir)) |
1d2af02a JA |
141 | return 0; |
142 | ||
143 | if (io_u->offset == sd->last_offset && io_u->file == sd->last_file && | |
144 | io_u->ddir == sd->last_ddir) | |
145 | return 1; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | static void fio_vsyncio_set_iov(struct syncio_data *sd, struct io_u *io_u, | |
2b13e716 | 151 | int idx) |
1d2af02a | 152 | { |
2b13e716 JA |
153 | sd->io_us[idx] = io_u; |
154 | sd->iovecs[idx].iov_base = io_u->xfer_buf; | |
155 | sd->iovecs[idx].iov_len = io_u->xfer_buflen; | |
1d2af02a JA |
156 | sd->last_offset = io_u->offset + io_u->xfer_buflen; |
157 | sd->last_file = io_u->file; | |
158 | sd->last_ddir = io_u->ddir; | |
159 | sd->queued_bytes += io_u->xfer_buflen; | |
160 | sd->queued++; | |
161 | } | |
162 | ||
163 | static int fio_vsyncio_queue(struct thread_data *td, struct io_u *io_u) | |
164 | { | |
165 | struct syncio_data *sd = td->io_ops->data; | |
166 | ||
167 | fio_ro_check(td, io_u); | |
168 | ||
169 | if (!fio_vsyncio_append(td, io_u)) { | |
170 | dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued); | |
171 | /* | |
172 | * If we can't append and have stuff queued, tell fio to | |
173 | * commit those first and then retry this io | |
174 | */ | |
175 | if (sd->queued) | |
176 | return FIO_Q_BUSY; | |
0a28ecda JA |
177 | if (ddir_sync(io_u->ddir)) { |
178 | int ret = do_io_u_sync(td, io_u); | |
179 | ||
180 | return fio_io_end(td, io_u, ret); | |
181 | } | |
cc9159c3 | 182 | |
1d2af02a JA |
183 | sd->queued = 0; |
184 | sd->queued_bytes = 0; | |
185 | fio_vsyncio_set_iov(sd, io_u, 0); | |
186 | } else { | |
187 | if (sd->queued == td->o.iodepth) { | |
188 | dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued); | |
189 | return FIO_Q_BUSY; | |
190 | } | |
191 | ||
192 | dprint(FD_IO, "vsyncio_queue: append\n"); | |
193 | fio_vsyncio_set_iov(sd, io_u, sd->queued); | |
194 | } | |
195 | ||
196 | dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued); | |
197 | return FIO_Q_QUEUED; | |
198 | } | |
199 | ||
200 | /* | |
201 | * Check that we transferred all bytes, or saw an error, etc | |
202 | */ | |
203 | static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes) | |
204 | { | |
205 | struct syncio_data *sd = td->io_ops->data; | |
206 | struct io_u *io_u; | |
207 | unsigned int i; | |
208 | int err; | |
209 | ||
210 | /* | |
211 | * transferred everything, perfect | |
212 | */ | |
213 | if (bytes == sd->queued_bytes) | |
214 | return 0; | |
215 | ||
216 | err = errno; | |
217 | for (i = 0; i < sd->queued; i++) { | |
218 | io_u = sd->io_us[i]; | |
219 | ||
220 | if (bytes == -1) { | |
221 | io_u->error = err; | |
222 | } else { | |
223 | unsigned int this_io; | |
224 | ||
225 | this_io = bytes; | |
226 | if (this_io > io_u->xfer_buflen) | |
227 | this_io = io_u->xfer_buflen; | |
228 | ||
229 | io_u->resid = io_u->xfer_buflen - this_io; | |
230 | io_u->error = 0; | |
231 | bytes -= this_io; | |
232 | } | |
233 | } | |
234 | ||
235 | if (bytes == -1) { | |
236 | td_verror(td, err, "xfer vsync"); | |
237 | return -err; | |
238 | } | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | static int fio_vsyncio_commit(struct thread_data *td) | |
244 | { | |
245 | struct syncio_data *sd = td->io_ops->data; | |
246 | struct fio_file *f; | |
247 | ssize_t ret; | |
248 | ||
249 | if (!sd->queued) | |
250 | return 0; | |
251 | ||
838bc709 | 252 | io_u_mark_submit(td, sd->queued); |
1d2af02a JA |
253 | f = sd->last_file; |
254 | ||
255 | if (lseek(f->fd, sd->io_us[0]->offset, SEEK_SET) == -1) { | |
256 | int err = -errno; | |
257 | ||
258 | td_verror(td, errno, "lseek"); | |
259 | return err; | |
260 | } | |
261 | ||
262 | if (sd->last_ddir == DDIR_READ) | |
263 | ret = readv(f->fd, sd->iovecs, sd->queued); | |
264 | else | |
265 | ret = writev(f->fd, sd->iovecs, sd->queued); | |
266 | ||
267 | dprint(FD_IO, "vsyncio_commit: %d\n", (int) ret); | |
e51cf72c JA |
268 | sd->events = sd->queued; |
269 | sd->queued = 0; | |
1d2af02a JA |
270 | return fio_vsyncio_end(td, ret); |
271 | } | |
272 | ||
273 | static int fio_vsyncio_init(struct thread_data *td) | |
274 | { | |
275 | struct syncio_data *sd; | |
276 | ||
277 | sd = malloc(sizeof(*sd)); | |
278 | memset(sd, 0, sizeof(*sd)); | |
279 | sd->last_offset = -1ULL; | |
280 | sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec)); | |
281 | sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *)); | |
282 | ||
283 | td->io_ops->data = sd; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static void fio_vsyncio_cleanup(struct thread_data *td) | |
288 | { | |
289 | struct syncio_data *sd = td->io_ops->data; | |
290 | ||
291 | free(sd->iovecs); | |
292 | free(sd->io_us); | |
293 | free(sd); | |
1d2af02a JA |
294 | } |
295 | ||
a31041ea | 296 | static struct ioengine_ops ioengine_rw = { |
2866c82d JA |
297 | .name = "sync", |
298 | .version = FIO_IOOPS_VERSION, | |
2866c82d JA |
299 | .prep = fio_syncio_prep, |
300 | .queue = fio_syncio_queue, | |
b5af8293 JA |
301 | .open_file = generic_open_file, |
302 | .close_file = generic_close_file, | |
df9c26b1 | 303 | .get_file_size = generic_get_file_size, |
2866c82d JA |
304 | .flags = FIO_SYNCIO, |
305 | }; | |
5f350952 | 306 | |
a31041ea | 307 | static struct ioengine_ops ioengine_prw = { |
308 | .name = "psync", | |
309 | .version = FIO_IOOPS_VERSION, | |
2bd3eabc | 310 | .queue = fio_psyncio_queue, |
a31041ea | 311 | .open_file = generic_open_file, |
312 | .close_file = generic_close_file, | |
df9c26b1 | 313 | .get_file_size = generic_get_file_size, |
a31041ea | 314 | .flags = FIO_SYNCIO, |
315 | }; | |
316 | ||
1d2af02a JA |
317 | static struct ioengine_ops ioengine_vrw = { |
318 | .name = "vsync", | |
319 | .version = FIO_IOOPS_VERSION, | |
320 | .init = fio_vsyncio_init, | |
321 | .cleanup = fio_vsyncio_cleanup, | |
322 | .queue = fio_vsyncio_queue, | |
323 | .commit = fio_vsyncio_commit, | |
324 | .event = fio_vsyncio_event, | |
325 | .getevents = fio_vsyncio_getevents, | |
326 | .open_file = generic_open_file, | |
327 | .close_file = generic_close_file, | |
df9c26b1 | 328 | .get_file_size = generic_get_file_size, |
1d2af02a JA |
329 | .flags = FIO_SYNCIO, |
330 | }; | |
331 | ||
5f350952 JA |
332 | static void fio_init fio_syncio_register(void) |
333 | { | |
a31041ea | 334 | register_ioengine(&ioengine_rw); |
335 | register_ioengine(&ioengine_prw); | |
1d2af02a | 336 | register_ioengine(&ioengine_vrw); |
5f350952 JA |
337 | } |
338 | ||
339 | static void fio_exit fio_syncio_unregister(void) | |
340 | { | |
a31041ea | 341 | unregister_ioengine(&ioengine_rw); |
342 | unregister_ioengine(&ioengine_prw); | |
1d2af02a | 343 | unregister_ioengine(&ioengine_vrw); |
5f350952 | 344 | } |