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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; | |
976fb54e | 50 | int ret, flags = OS_O_DIRECT; |
56a19325 DF |
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 | ||
976fb54e | 64 | if (td_write(td)) { |
56a19325 DF |
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"); | |
976fb54e DF |
74 | log_err("%s: libzbc does not support trim\n", f->file_name); |
75 | return -EINVAL; | |
56a19325 DF |
76 | } |
77 | ||
976fb54e | 78 | if (td->o.oatomic) { |
56a19325 | 79 | td_verror(td, EINVAL, "libzbc does not support O_ATOMIC"); |
976fb54e DF |
80 | log_err("%s: libzbc does not support O_ATOMIC\n", f->file_name); |
81 | return -EINVAL; | |
82 | } | |
56a19325 DF |
83 | |
84 | ld = calloc(1, sizeof(*ld)); | |
85 | if (!ld) | |
86 | return -ENOMEM; | |
87 | ||
88 | ret = zbc_open(f->file_name, | |
ed2eb875 DF |
89 | flags | ZBC_O_DRV_BLOCK | ZBC_O_DRV_SCSI | ZBC_O_DRV_ATA, |
90 | &ld->zdev); | |
56a19325 DF |
91 | if (ret) { |
92 | log_err("%s: zbc_open() failed, err=%d\n", | |
93 | f->file_name, ret); | |
891660e4 | 94 | goto err; |
56a19325 DF |
95 | } |
96 | ||
97 | ret = libzbc_get_dev_info(ld, f); | |
891660e4 DF |
98 | if (ret) |
99 | goto err_close; | |
56a19325 DF |
100 | |
101 | td->io_ops_data = ld; | |
102 | out: | |
103 | if (p_ld) | |
104 | *p_ld = ld; | |
105 | ||
106 | return 0; | |
891660e4 DF |
107 | |
108 | err_close: | |
109 | zbc_close(ld->zdev); | |
110 | err: | |
111 | free(ld); | |
112 | return ret; | |
56a19325 DF |
113 | } |
114 | ||
115 | static int libzbc_close_dev(struct thread_data *td) | |
116 | { | |
117 | struct libzbc_data *ld = td->io_ops_data; | |
118 | int ret = 0; | |
119 | ||
120 | td->io_ops_data = NULL; | |
121 | if (ld) { | |
122 | if (ld->zdev) | |
123 | ret = zbc_close(ld->zdev); | |
124 | free(ld); | |
125 | } | |
126 | ||
127 | return ret; | |
128 | } | |
129 | static int libzbc_open_file(struct thread_data *td, struct fio_file *f) | |
130 | { | |
131 | return libzbc_open_dev(td, f, NULL); | |
132 | } | |
133 | ||
134 | static int libzbc_close_file(struct thread_data *td, struct fio_file *f) | |
135 | { | |
136 | int ret; | |
137 | ||
138 | ret = libzbc_close_dev(td); | |
139 | if (ret) | |
140 | log_err("%s: close device failed err %d\n", | |
141 | f->file_name, ret); | |
142 | ||
143 | return ret; | |
144 | } | |
145 | ||
146 | static void libzbc_cleanup(struct thread_data *td) | |
147 | { | |
148 | libzbc_close_dev(td); | |
149 | } | |
150 | ||
151 | static int libzbc_invalidate(struct thread_data *td, struct fio_file *f) | |
152 | { | |
153 | /* Passthrough IO do not cache data. Nothing to do */ | |
154 | return 0; | |
155 | } | |
156 | ||
157 | static int libzbc_get_file_size(struct thread_data *td, struct fio_file *f) | |
158 | { | |
159 | struct libzbc_data *ld; | |
160 | int ret; | |
161 | ||
162 | if (fio_file_size_known(f)) | |
163 | return 0; | |
164 | ||
165 | ret = libzbc_open_dev(td, f, &ld); | |
166 | if (ret) | |
167 | return ret; | |
168 | ||
169 | f->real_file_size = ld->nr_sectors << 9; | |
170 | fio_file_set_size_known(f); | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | static int libzbc_get_zoned_model(struct thread_data *td, struct fio_file *f, | |
176 | enum zbd_zoned_model *model) | |
177 | { | |
178 | struct libzbc_data *ld; | |
179 | int ret; | |
180 | ||
181 | if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) { | |
182 | *model = ZBD_IGNORE; | |
183 | return 0; | |
184 | } | |
185 | ||
186 | ret = libzbc_open_dev(td, f, &ld); | |
187 | if (ret) | |
188 | return ret; | |
189 | ||
190 | switch (ld->model) { | |
191 | case ZBC_DM_HOST_AWARE: | |
192 | *model = ZBD_HOST_AWARE; | |
193 | break; | |
194 | case ZBC_DM_HOST_MANAGED: | |
195 | *model = ZBD_HOST_MANAGED; | |
196 | break; | |
197 | default: | |
198 | *model = ZBD_NONE; | |
199 | break; | |
200 | } | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
205 | static int libzbc_report_zones(struct thread_data *td, struct fio_file *f, | |
206 | uint64_t offset, struct zbd_zone *zbdz, | |
207 | unsigned int nr_zones) | |
208 | { | |
209 | struct libzbc_data *ld; | |
210 | uint64_t sector = offset >> 9; | |
211 | struct zbc_zone *zones; | |
212 | unsigned int i; | |
213 | int ret; | |
214 | ||
215 | ret = libzbc_open_dev(td, f, &ld); | |
216 | if (ret) | |
217 | return ret; | |
218 | ||
219 | if (sector >= ld->nr_sectors) | |
220 | return 0; | |
221 | ||
222 | zones = calloc(nr_zones, sizeof(struct zbc_zone)); | |
223 | if (!zones) { | |
224 | ret = -ENOMEM; | |
225 | goto out; | |
226 | } | |
227 | ||
228 | ret = zbc_report_zones(ld->zdev, sector, ZBC_RO_ALL, zones, &nr_zones); | |
229 | if (ret < 0) { | |
230 | log_err("%s: zbc_report_zones failed, err=%d\n", | |
231 | f->file_name, ret); | |
232 | goto out; | |
233 | } | |
234 | ||
235 | for (i = 0; i < nr_zones; i++, zbdz++) { | |
236 | zbdz->start = zones[i].zbz_start << 9; | |
237 | zbdz->len = zones[i].zbz_length << 9; | |
238 | zbdz->wp = zones[i].zbz_write_pointer << 9; | |
236d23a8 SK |
239 | /* |
240 | * ZBC/ZAC do not define zone capacity, so use the zone size as | |
241 | * the zone capacity. | |
242 | */ | |
243 | zbdz->capacity = zbdz->len; | |
56a19325 DF |
244 | |
245 | switch (zones[i].zbz_type) { | |
246 | case ZBC_ZT_CONVENTIONAL: | |
247 | zbdz->type = ZBD_ZONE_TYPE_CNV; | |
248 | break; | |
249 | case ZBC_ZT_SEQUENTIAL_REQ: | |
250 | zbdz->type = ZBD_ZONE_TYPE_SWR; | |
251 | break; | |
252 | case ZBC_ZT_SEQUENTIAL_PREF: | |
253 | zbdz->type = ZBD_ZONE_TYPE_SWP; | |
254 | break; | |
255 | default: | |
256 | td_verror(td, errno, "invalid zone type"); | |
257 | log_err("%s: invalid type for zone at sector %llu.\n", | |
258 | f->file_name, (unsigned long long)zbdz->start); | |
259 | ret = -EIO; | |
260 | goto out; | |
261 | } | |
262 | ||
263 | switch (zones[i].zbz_condition) { | |
264 | case ZBC_ZC_NOT_WP: | |
265 | zbdz->cond = ZBD_ZONE_COND_NOT_WP; | |
266 | break; | |
267 | case ZBC_ZC_EMPTY: | |
268 | zbdz->cond = ZBD_ZONE_COND_EMPTY; | |
269 | break; | |
270 | case ZBC_ZC_IMP_OPEN: | |
271 | zbdz->cond = ZBD_ZONE_COND_IMP_OPEN; | |
272 | break; | |
273 | case ZBC_ZC_EXP_OPEN: | |
274 | zbdz->cond = ZBD_ZONE_COND_EXP_OPEN; | |
275 | break; | |
276 | case ZBC_ZC_CLOSED: | |
277 | zbdz->cond = ZBD_ZONE_COND_CLOSED; | |
278 | break; | |
279 | case ZBC_ZC_FULL: | |
280 | zbdz->cond = ZBD_ZONE_COND_FULL; | |
281 | break; | |
282 | case ZBC_ZC_RDONLY: | |
283 | case ZBC_ZC_OFFLINE: | |
284 | default: | |
285 | /* Treat all these conditions as offline (don't use!) */ | |
286 | zbdz->cond = ZBD_ZONE_COND_OFFLINE; | |
59b67452 | 287 | zbdz->wp = zbdz->start; |
56a19325 DF |
288 | } |
289 | } | |
290 | ||
291 | ret = nr_zones; | |
292 | out: | |
293 | free(zones); | |
294 | return ret; | |
295 | } | |
296 | ||
297 | static int libzbc_reset_wp(struct thread_data *td, struct fio_file *f, | |
298 | uint64_t offset, uint64_t length) | |
299 | { | |
300 | struct libzbc_data *ld = td->io_ops_data; | |
301 | uint64_t sector = offset >> 9; | |
302 | uint64_t end_sector = (offset + length) >> 9; | |
303 | unsigned int nr_zones; | |
304 | struct zbc_errno err; | |
305 | int i, ret; | |
306 | ||
307 | assert(ld); | |
308 | assert(ld->zdev); | |
309 | ||
310 | nr_zones = (length + td->o.zone_size - 1) / td->o.zone_size; | |
311 | if (!sector && end_sector >= ld->nr_sectors) { | |
312 | /* Reset all zones */ | |
313 | ret = zbc_reset_zone(ld->zdev, 0, ZBC_OP_ALL_ZONES); | |
314 | if (ret) | |
315 | goto err; | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
320 | for (i = 0; i < nr_zones; i++, sector += td->o.zone_size >> 9) { | |
321 | ret = zbc_reset_zone(ld->zdev, sector, 0); | |
322 | if (ret) | |
323 | goto err; | |
324 | } | |
325 | ||
326 | return 0; | |
327 | ||
328 | err: | |
329 | zbc_errno(ld->zdev, &err); | |
330 | td_verror(td, errno, "zbc_reset_zone failed"); | |
331 | if (err.sk) | |
332 | log_err("%s: reset wp failed %s:%s\n", | |
333 | f->file_name, | |
334 | zbc_sk_str(err.sk), zbc_asc_ascq_str(err.asc_ascq)); | |
335 | return -ret; | |
336 | } | |
337 | ||
338 | ssize_t libzbc_rw(struct thread_data *td, struct io_u *io_u) | |
339 | { | |
340 | struct libzbc_data *ld = td->io_ops_data; | |
341 | struct fio_file *f = io_u->file; | |
342 | uint64_t sector = io_u->offset >> 9; | |
343 | size_t count = io_u->xfer_buflen >> 9; | |
344 | struct zbc_errno err; | |
345 | ssize_t ret; | |
346 | ||
347 | if (io_u->ddir == DDIR_WRITE) | |
348 | ret = zbc_pwrite(ld->zdev, io_u->xfer_buf, count, sector); | |
349 | else | |
350 | ret = zbc_pread(ld->zdev, io_u->xfer_buf, count, sector); | |
351 | if (ret == count) | |
352 | return ret; | |
353 | ||
354 | if (ret > 0) { | |
355 | log_err("Short %s, len=%zu, ret=%zd\n", | |
356 | io_u->ddir == DDIR_READ ? "read" : "write", | |
357 | count << 9, ret << 9); | |
358 | return -EIO; | |
359 | } | |
360 | ||
361 | /* I/O error */ | |
362 | zbc_errno(ld->zdev, &err); | |
363 | td_verror(td, errno, "libzbc i/o failed"); | |
364 | if (err.sk) { | |
365 | log_err("%s: op %u offset %llu+%llu failed (%s:%s), err %zd\n", | |
366 | f->file_name, io_u->ddir, | |
367 | io_u->offset, io_u->xfer_buflen, | |
368 | zbc_sk_str(err.sk), | |
369 | zbc_asc_ascq_str(err.asc_ascq), ret); | |
370 | } else { | |
371 | log_err("%s: op %u offset %llu+%llu failed, err %zd\n", | |
372 | f->file_name, io_u->ddir, | |
373 | io_u->offset, io_u->xfer_buflen, ret); | |
374 | } | |
375 | ||
376 | return -EIO; | |
377 | } | |
378 | ||
379 | static enum fio_q_status libzbc_queue(struct thread_data *td, struct io_u *io_u) | |
380 | { | |
381 | struct libzbc_data *ld = td->io_ops_data; | |
382 | struct fio_file *f = io_u->file; | |
383 | ssize_t ret = 0; | |
384 | ||
385 | fio_ro_check(td, io_u); | |
386 | ||
387 | dprint(FD_ZBD, "%p:%s: libzbc queue %llu\n", | |
388 | td, f->file_name, io_u->offset); | |
389 | ||
390 | if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) { | |
391 | ret = libzbc_rw(td, io_u); | |
392 | } else if (ddir_sync(io_u->ddir)) { | |
393 | ret = zbc_flush(ld->zdev); | |
394 | if (ret) | |
395 | log_err("zbc_flush error %zd\n", ret); | |
396 | } else if (io_u->ddir != DDIR_TRIM) { | |
397 | log_err("Unsupported operation %u\n", io_u->ddir); | |
398 | ret = -EINVAL; | |
399 | } | |
400 | if (ret < 0) | |
401 | io_u->error = -ret; | |
402 | ||
403 | return FIO_Q_COMPLETED; | |
404 | } | |
405 | ||
5a8a6a03 | 406 | FIO_STATIC struct ioengine_ops ioengine = { |
56a19325 DF |
407 | .name = "libzbc", |
408 | .version = FIO_IOOPS_VERSION, | |
409 | .open_file = libzbc_open_file, | |
410 | .close_file = libzbc_close_file, | |
411 | .cleanup = libzbc_cleanup, | |
412 | .invalidate = libzbc_invalidate, | |
413 | .get_file_size = libzbc_get_file_size, | |
414 | .get_zoned_model = libzbc_get_zoned_model, | |
415 | .report_zones = libzbc_report_zones, | |
416 | .reset_wp = libzbc_reset_wp, | |
417 | .queue = libzbc_queue, | |
418 | .flags = FIO_SYNCIO | FIO_NOEXTEND | FIO_RAWIO, | |
419 | }; | |
420 | ||
421 | static void fio_init fio_libzbc_register(void) | |
422 | { | |
423 | register_ioengine(&ioengine); | |
424 | } | |
425 | ||
426 | static void fio_exit fio_libzbc_unregister(void) | |
427 | { | |
428 | unregister_ioengine(&ioengine); | |
429 | } |