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