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56a19325 DF |
1 | /* |
2 | * Copyright (C) 2019 Western Digital Corporation or its affiliates. | |
3 | * | |
4 | * This file is released under the GPL. | |
5 | * | |
6 | * libzbc engine | |
7 | * IO engine using libzbc library to talk to SMR disks. | |
8 | */ | |
9 | #include <stdlib.h> | |
10 | #include <unistd.h> | |
11 | #include <errno.h> | |
12 | #include <libzbc/zbc.h> | |
13 | ||
14 | #include "fio.h" | |
15 | #include "err.h" | |
16 | #include "zbd_types.h" | |
17 | ||
18 | struct libzbc_data { | |
19 | struct zbc_device *zdev; | |
20 | enum zbc_dev_model model; | |
21 | uint64_t nr_sectors; | |
22 | }; | |
23 | ||
24 | static int libzbc_get_dev_info(struct libzbc_data *ld, struct fio_file *f) | |
25 | { | |
26 | struct zbc_device_info *zinfo; | |
27 | ||
28 | zinfo = calloc(1, sizeof(*zinfo)); | |
29 | if (!zinfo) | |
30 | return -ENOMEM; | |
31 | ||
32 | zbc_get_device_info(ld->zdev, zinfo); | |
33 | ld->model = zinfo->zbd_model; | |
34 | ld->nr_sectors = zinfo->zbd_sectors; | |
35 | ||
36 | dprint(FD_ZBD, "%s: vendor_id:%s, type: %s, model: %s\n", | |
37 | f->file_name, zinfo->zbd_vendor_id, | |
38 | zbc_device_type_str(zinfo->zbd_type), | |
39 | zbc_device_model_str(zinfo->zbd_model)); | |
40 | ||
41 | free(zinfo); | |
42 | ||
43 | return 0; | |
44 | } | |
45 | ||
46 | static int libzbc_open_dev(struct thread_data *td, struct fio_file *f, | |
47 | struct libzbc_data **p_ld) | |
48 | { | |
49 | struct libzbc_data *ld = td->io_ops_data; | |
50 | int ret, flags = OS_O_DIRECT; | |
51 | ||
52 | if (ld) { | |
53 | /* Already open */ | |
54 | assert(ld->zdev); | |
55 | goto out; | |
56 | } | |
57 | ||
58 | if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) { | |
59 | td_verror(td, EINVAL, "wrong file type"); | |
60 | log_err("ioengine libzbc only works on block or character devices\n"); | |
61 | return -EINVAL; | |
62 | } | |
63 | ||
64 | if (td_write(td)) { | |
65 | if (!read_only) | |
66 | flags |= O_RDWR; | |
67 | } else if (td_read(td)) { | |
68 | if (f->filetype == FIO_TYPE_CHAR && !read_only) | |
69 | flags |= O_RDWR; | |
70 | else | |
71 | flags |= O_RDONLY; | |
72 | } else if (td_trim(td)) { | |
73 | td_verror(td, EINVAL, "libzbc does not support trim"); | |
74 | log_err("%s: libzbc does not support trim\n", | |
75 | f->file_name); | |
76 | return -EINVAL; | |
77 | } | |
78 | ||
79 | if (td->o.oatomic) { | |
80 | td_verror(td, EINVAL, "libzbc does not support O_ATOMIC"); | |
81 | log_err("%s: libzbc does not support O_ATOMIC\n", | |
82 | f->file_name); | |
83 | return -EINVAL; | |
84 | } | |
85 | ||
86 | ld = calloc(1, sizeof(*ld)); | |
87 | if (!ld) | |
88 | return -ENOMEM; | |
89 | ||
90 | ret = zbc_open(f->file_name, | |
91 | flags | ZBC_O_DRV_SCSI | ZBC_O_DRV_ATA, &ld->zdev); | |
92 | if (ret) { | |
93 | log_err("%s: zbc_open() failed, err=%d\n", | |
94 | f->file_name, ret); | |
95 | return ret; | |
96 | } | |
97 | ||
98 | ret = libzbc_get_dev_info(ld, f); | |
99 | if (ret) { | |
100 | zbc_close(ld->zdev); | |
101 | free(ld); | |
102 | return ret; | |
103 | } | |
104 | ||
105 | td->io_ops_data = ld; | |
106 | out: | |
107 | if (p_ld) | |
108 | *p_ld = ld; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int libzbc_close_dev(struct thread_data *td) | |
114 | { | |
115 | struct libzbc_data *ld = td->io_ops_data; | |
116 | int ret = 0; | |
117 | ||
118 | td->io_ops_data = NULL; | |
119 | if (ld) { | |
120 | if (ld->zdev) | |
121 | ret = zbc_close(ld->zdev); | |
122 | free(ld); | |
123 | } | |
124 | ||
125 | return ret; | |
126 | } | |
127 | static int libzbc_open_file(struct thread_data *td, struct fio_file *f) | |
128 | { | |
129 | return libzbc_open_dev(td, f, NULL); | |
130 | } | |
131 | ||
132 | static int libzbc_close_file(struct thread_data *td, struct fio_file *f) | |
133 | { | |
134 | int ret; | |
135 | ||
136 | ret = libzbc_close_dev(td); | |
137 | if (ret) | |
138 | log_err("%s: close device failed err %d\n", | |
139 | f->file_name, ret); | |
140 | ||
141 | return ret; | |
142 | } | |
143 | ||
144 | static void libzbc_cleanup(struct thread_data *td) | |
145 | { | |
146 | libzbc_close_dev(td); | |
147 | } | |
148 | ||
149 | static int libzbc_invalidate(struct thread_data *td, struct fio_file *f) | |
150 | { | |
151 | /* Passthrough IO do not cache data. Nothing to do */ | |
152 | return 0; | |
153 | } | |
154 | ||
155 | static int libzbc_get_file_size(struct thread_data *td, struct fio_file *f) | |
156 | { | |
157 | struct libzbc_data *ld; | |
158 | int ret; | |
159 | ||
160 | if (fio_file_size_known(f)) | |
161 | return 0; | |
162 | ||
163 | ret = libzbc_open_dev(td, f, &ld); | |
164 | if (ret) | |
165 | return ret; | |
166 | ||
167 | f->real_file_size = ld->nr_sectors << 9; | |
168 | fio_file_set_size_known(f); | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static int libzbc_get_zoned_model(struct thread_data *td, struct fio_file *f, | |
174 | enum zbd_zoned_model *model) | |
175 | { | |
176 | struct libzbc_data *ld; | |
177 | int ret; | |
178 | ||
179 | if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) { | |
180 | *model = ZBD_IGNORE; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | ret = libzbc_open_dev(td, f, &ld); | |
185 | if (ret) | |
186 | return ret; | |
187 | ||
188 | switch (ld->model) { | |
189 | case ZBC_DM_HOST_AWARE: | |
190 | *model = ZBD_HOST_AWARE; | |
191 | break; | |
192 | case ZBC_DM_HOST_MANAGED: | |
193 | *model = ZBD_HOST_MANAGED; | |
194 | break; | |
195 | default: | |
196 | *model = ZBD_NONE; | |
197 | break; | |
198 | } | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static int libzbc_report_zones(struct thread_data *td, struct fio_file *f, | |
204 | uint64_t offset, struct zbd_zone *zbdz, | |
205 | unsigned int nr_zones) | |
206 | { | |
207 | struct libzbc_data *ld; | |
208 | uint64_t sector = offset >> 9; | |
209 | struct zbc_zone *zones; | |
210 | unsigned int i; | |
211 | int ret; | |
212 | ||
213 | ret = libzbc_open_dev(td, f, &ld); | |
214 | if (ret) | |
215 | return ret; | |
216 | ||
217 | if (sector >= ld->nr_sectors) | |
218 | return 0; | |
219 | ||
220 | zones = calloc(nr_zones, sizeof(struct zbc_zone)); | |
221 | if (!zones) { | |
222 | ret = -ENOMEM; | |
223 | goto out; | |
224 | } | |
225 | ||
226 | ret = zbc_report_zones(ld->zdev, sector, ZBC_RO_ALL, zones, &nr_zones); | |
227 | if (ret < 0) { | |
228 | log_err("%s: zbc_report_zones failed, err=%d\n", | |
229 | f->file_name, ret); | |
230 | goto out; | |
231 | } | |
232 | ||
233 | for (i = 0; i < nr_zones; i++, zbdz++) { | |
234 | zbdz->start = zones[i].zbz_start << 9; | |
235 | zbdz->len = zones[i].zbz_length << 9; | |
236 | zbdz->wp = zones[i].zbz_write_pointer << 9; | |
237 | ||
238 | switch (zones[i].zbz_type) { | |
239 | case ZBC_ZT_CONVENTIONAL: | |
240 | zbdz->type = ZBD_ZONE_TYPE_CNV; | |
241 | break; | |
242 | case ZBC_ZT_SEQUENTIAL_REQ: | |
243 | zbdz->type = ZBD_ZONE_TYPE_SWR; | |
244 | break; | |
245 | case ZBC_ZT_SEQUENTIAL_PREF: | |
246 | zbdz->type = ZBD_ZONE_TYPE_SWP; | |
247 | break; | |
248 | default: | |
249 | td_verror(td, errno, "invalid zone type"); | |
250 | log_err("%s: invalid type for zone at sector %llu.\n", | |
251 | f->file_name, (unsigned long long)zbdz->start); | |
252 | ret = -EIO; | |
253 | goto out; | |
254 | } | |
255 | ||
256 | switch (zones[i].zbz_condition) { | |
257 | case ZBC_ZC_NOT_WP: | |
258 | zbdz->cond = ZBD_ZONE_COND_NOT_WP; | |
259 | break; | |
260 | case ZBC_ZC_EMPTY: | |
261 | zbdz->cond = ZBD_ZONE_COND_EMPTY; | |
262 | break; | |
263 | case ZBC_ZC_IMP_OPEN: | |
264 | zbdz->cond = ZBD_ZONE_COND_IMP_OPEN; | |
265 | break; | |
266 | case ZBC_ZC_EXP_OPEN: | |
267 | zbdz->cond = ZBD_ZONE_COND_EXP_OPEN; | |
268 | break; | |
269 | case ZBC_ZC_CLOSED: | |
270 | zbdz->cond = ZBD_ZONE_COND_CLOSED; | |
271 | break; | |
272 | case ZBC_ZC_FULL: | |
273 | zbdz->cond = ZBD_ZONE_COND_FULL; | |
274 | break; | |
275 | case ZBC_ZC_RDONLY: | |
276 | case ZBC_ZC_OFFLINE: | |
277 | default: | |
278 | /* Treat all these conditions as offline (don't use!) */ | |
279 | zbdz->cond = ZBD_ZONE_COND_OFFLINE; | |
280 | break; | |
281 | } | |
282 | } | |
283 | ||
284 | ret = nr_zones; | |
285 | out: | |
286 | free(zones); | |
287 | return ret; | |
288 | } | |
289 | ||
290 | static int libzbc_reset_wp(struct thread_data *td, struct fio_file *f, | |
291 | uint64_t offset, uint64_t length) | |
292 | { | |
293 | struct libzbc_data *ld = td->io_ops_data; | |
294 | uint64_t sector = offset >> 9; | |
295 | uint64_t end_sector = (offset + length) >> 9; | |
296 | unsigned int nr_zones; | |
297 | struct zbc_errno err; | |
298 | int i, ret; | |
299 | ||
300 | assert(ld); | |
301 | assert(ld->zdev); | |
302 | ||
303 | nr_zones = (length + td->o.zone_size - 1) / td->o.zone_size; | |
304 | if (!sector && end_sector >= ld->nr_sectors) { | |
305 | /* Reset all zones */ | |
306 | ret = zbc_reset_zone(ld->zdev, 0, ZBC_OP_ALL_ZONES); | |
307 | if (ret) | |
308 | goto err; | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
313 | for (i = 0; i < nr_zones; i++, sector += td->o.zone_size >> 9) { | |
314 | ret = zbc_reset_zone(ld->zdev, sector, 0); | |
315 | if (ret) | |
316 | goto err; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | ||
321 | err: | |
322 | zbc_errno(ld->zdev, &err); | |
323 | td_verror(td, errno, "zbc_reset_zone failed"); | |
324 | if (err.sk) | |
325 | log_err("%s: reset wp failed %s:%s\n", | |
326 | f->file_name, | |
327 | zbc_sk_str(err.sk), zbc_asc_ascq_str(err.asc_ascq)); | |
328 | return -ret; | |
329 | } | |
330 | ||
331 | ssize_t libzbc_rw(struct thread_data *td, struct io_u *io_u) | |
332 | { | |
333 | struct libzbc_data *ld = td->io_ops_data; | |
334 | struct fio_file *f = io_u->file; | |
335 | uint64_t sector = io_u->offset >> 9; | |
336 | size_t count = io_u->xfer_buflen >> 9; | |
337 | struct zbc_errno err; | |
338 | ssize_t ret; | |
339 | ||
340 | if (io_u->ddir == DDIR_WRITE) | |
341 | ret = zbc_pwrite(ld->zdev, io_u->xfer_buf, count, sector); | |
342 | else | |
343 | ret = zbc_pread(ld->zdev, io_u->xfer_buf, count, sector); | |
344 | if (ret == count) | |
345 | return ret; | |
346 | ||
347 | if (ret > 0) { | |
348 | log_err("Short %s, len=%zu, ret=%zd\n", | |
349 | io_u->ddir == DDIR_READ ? "read" : "write", | |
350 | count << 9, ret << 9); | |
351 | return -EIO; | |
352 | } | |
353 | ||
354 | /* I/O error */ | |
355 | zbc_errno(ld->zdev, &err); | |
356 | td_verror(td, errno, "libzbc i/o failed"); | |
357 | if (err.sk) { | |
358 | log_err("%s: op %u offset %llu+%llu failed (%s:%s), err %zd\n", | |
359 | f->file_name, io_u->ddir, | |
360 | io_u->offset, io_u->xfer_buflen, | |
361 | zbc_sk_str(err.sk), | |
362 | zbc_asc_ascq_str(err.asc_ascq), ret); | |
363 | } else { | |
364 | log_err("%s: op %u offset %llu+%llu failed, err %zd\n", | |
365 | f->file_name, io_u->ddir, | |
366 | io_u->offset, io_u->xfer_buflen, ret); | |
367 | } | |
368 | ||
369 | return -EIO; | |
370 | } | |
371 | ||
372 | static enum fio_q_status libzbc_queue(struct thread_data *td, struct io_u *io_u) | |
373 | { | |
374 | struct libzbc_data *ld = td->io_ops_data; | |
375 | struct fio_file *f = io_u->file; | |
376 | ssize_t ret = 0; | |
377 | ||
378 | fio_ro_check(td, io_u); | |
379 | ||
380 | dprint(FD_ZBD, "%p:%s: libzbc queue %llu\n", | |
381 | td, f->file_name, io_u->offset); | |
382 | ||
383 | if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) { | |
384 | ret = libzbc_rw(td, io_u); | |
385 | } else if (ddir_sync(io_u->ddir)) { | |
386 | ret = zbc_flush(ld->zdev); | |
387 | if (ret) | |
388 | log_err("zbc_flush error %zd\n", ret); | |
389 | } else if (io_u->ddir != DDIR_TRIM) { | |
390 | log_err("Unsupported operation %u\n", io_u->ddir); | |
391 | ret = -EINVAL; | |
392 | } | |
393 | if (ret < 0) | |
394 | io_u->error = -ret; | |
395 | ||
396 | return FIO_Q_COMPLETED; | |
397 | } | |
398 | ||
399 | static struct ioengine_ops ioengine = { | |
400 | .name = "libzbc", | |
401 | .version = FIO_IOOPS_VERSION, | |
402 | .open_file = libzbc_open_file, | |
403 | .close_file = libzbc_close_file, | |
404 | .cleanup = libzbc_cleanup, | |
405 | .invalidate = libzbc_invalidate, | |
406 | .get_file_size = libzbc_get_file_size, | |
407 | .get_zoned_model = libzbc_get_zoned_model, | |
408 | .report_zones = libzbc_report_zones, | |
409 | .reset_wp = libzbc_reset_wp, | |
410 | .queue = libzbc_queue, | |
411 | .flags = FIO_SYNCIO | FIO_NOEXTEND | FIO_RAWIO, | |
412 | }; | |
413 | ||
414 | static void fio_init fio_libzbc_register(void) | |
415 | { | |
416 | register_ioengine(&ioengine); | |
417 | } | |
418 | ||
419 | static void fio_exit fio_libzbc_unregister(void) | |
420 | { | |
421 | unregister_ioengine(&ioengine); | |
422 | } |