Commit | Line | Data |
---|---|---|
bfbdd35b BVA |
1 | /* |
2 | * Copyright (C) 2018 Western Digital Corporation or its affiliates. | |
3 | * | |
4 | * This file is released under the GPL. | |
5 | */ | |
6 | ||
7 | #include <errno.h> | |
8 | #include <string.h> | |
9 | #include <stdlib.h> | |
bfbdd35b | 10 | #include <fcntl.h> |
bfbdd35b BVA |
11 | #include <sys/stat.h> |
12 | #include <unistd.h> | |
f5bff36e | 13 | |
bfbdd35b BVA |
14 | #include "file.h" |
15 | #include "fio.h" | |
16 | #include "lib/pow2.h" | |
17 | #include "log.h" | |
f5bff36e | 18 | #include "oslib/asprintf.h" |
bfbdd35b BVA |
19 | #include "smalloc.h" |
20 | #include "verify.h" | |
21 | #include "zbd.h" | |
22 | ||
b7694961 DLM |
23 | /** |
24 | * zbd_get_zoned_model - Get a device zoned model | |
25 | * @td: FIO thread data | |
26 | * @f: FIO file for which to get model information | |
27 | */ | |
28 | int zbd_get_zoned_model(struct thread_data *td, struct fio_file *f, | |
29 | enum zbd_zoned_model *model) | |
30 | { | |
31 | int ret; | |
32 | ||
6c5b11d3 DLM |
33 | if (td->io_ops && td->io_ops->get_zoned_model) |
34 | ret = td->io_ops->get_zoned_model(td, f, model); | |
35 | else | |
36 | ret = blkzoned_get_zoned_model(td, f, model); | |
b7694961 DLM |
37 | if (ret < 0) { |
38 | td_verror(td, errno, "get zoned model failed"); | |
39 | log_err("%s: get zoned model failed (%d).\n", | |
40 | f->file_name, errno); | |
41 | } | |
42 | ||
43 | return ret; | |
44 | } | |
45 | ||
46 | /** | |
47 | * zbd_report_zones - Get zone information | |
48 | * @td: FIO thread data. | |
49 | * @f: FIO file for which to get zone information | |
50 | * @offset: offset from which to report zones | |
51 | * @zones: Array of struct zbd_zone | |
52 | * @nr_zones: Size of @zones array | |
53 | * | |
54 | * Get zone information into @zones starting from the zone at offset @offset | |
55 | * for the device specified by @f. | |
56 | * | |
57 | * Returns the number of zones reported upon success and a negative error code | |
58 | * upon failure. If the zone report is empty, always assume an error (device | |
59 | * problem) and return -EIO. | |
60 | */ | |
61 | int zbd_report_zones(struct thread_data *td, struct fio_file *f, | |
62 | uint64_t offset, struct zbd_zone *zones, | |
63 | unsigned int nr_zones) | |
64 | { | |
65 | int ret; | |
66 | ||
6c5b11d3 DLM |
67 | if (td->io_ops && td->io_ops->report_zones) |
68 | ret = td->io_ops->report_zones(td, f, offset, zones, nr_zones); | |
69 | else | |
70 | ret = blkzoned_report_zones(td, f, offset, zones, nr_zones); | |
b7694961 DLM |
71 | if (ret < 0) { |
72 | td_verror(td, errno, "report zones failed"); | |
73 | log_err("%s: report zones from sector %llu failed (%d).\n", | |
74 | f->file_name, (unsigned long long)offset >> 9, errno); | |
75 | } else if (ret == 0) { | |
76 | td_verror(td, errno, "Empty zone report"); | |
77 | log_err("%s: report zones from sector %llu is empty.\n", | |
78 | f->file_name, (unsigned long long)offset >> 9); | |
79 | ret = -EIO; | |
80 | } | |
81 | ||
82 | return ret; | |
83 | } | |
84 | ||
85 | /** | |
86 | * zbd_reset_wp - reset the write pointer of a range of zones | |
87 | * @td: FIO thread data. | |
88 | * @f: FIO file for which to reset zones | |
89 | * @offset: Starting offset of the first zone to reset | |
90 | * @length: Length of the range of zones to reset | |
91 | * | |
92 | * Reset the write pointer of all zones in the range @offset...@offset+@length. | |
93 | * Returns 0 upon success and a negative error code upon failure. | |
94 | */ | |
95 | int zbd_reset_wp(struct thread_data *td, struct fio_file *f, | |
96 | uint64_t offset, uint64_t length) | |
97 | { | |
98 | int ret; | |
99 | ||
6c5b11d3 DLM |
100 | if (td->io_ops && td->io_ops->reset_wp) |
101 | ret = td->io_ops->reset_wp(td, f, offset, length); | |
102 | else | |
103 | ret = blkzoned_reset_wp(td, f, offset, length); | |
b7694961 DLM |
104 | if (ret < 0) { |
105 | td_verror(td, errno, "resetting wp failed"); | |
106 | log_err("%s: resetting wp for %llu sectors at sector %llu failed (%d).\n", | |
107 | f->file_name, (unsigned long long)length >> 9, | |
108 | (unsigned long long)offset >> 9, errno); | |
109 | } | |
110 | ||
111 | return ret; | |
112 | } | |
113 | ||
bfbdd35b BVA |
114 | /** |
115 | * zbd_zone_idx - convert an offset into a zone number | |
116 | * @f: file pointer. | |
117 | * @offset: offset in bytes. If this offset is in the first zone_size bytes | |
118 | * past the disk size then the index of the sentinel is returned. | |
119 | */ | |
120 | static uint32_t zbd_zone_idx(const struct fio_file *f, uint64_t offset) | |
121 | { | |
122 | uint32_t zone_idx; | |
123 | ||
cd775e06 | 124 | if (f->zbd_info->zone_size_log2 > 0) |
bfbdd35b BVA |
125 | zone_idx = offset >> f->zbd_info->zone_size_log2; |
126 | else | |
ee3696bd | 127 | zone_idx = offset / f->zbd_info->zone_size; |
bfbdd35b BVA |
128 | |
129 | return min(zone_idx, f->zbd_info->nr_zones); | |
130 | } | |
131 | ||
b7694961 DLM |
132 | /** |
133 | * zbd_zone_swr - Test whether a zone requires sequential writes | |
134 | * @z: zone info pointer. | |
135 | */ | |
136 | static inline bool zbd_zone_swr(struct fio_zone_info *z) | |
137 | { | |
138 | return z->type == ZBD_ZONE_TYPE_SWR; | |
139 | } | |
140 | ||
bfbdd35b BVA |
141 | /** |
142 | * zbd_zone_full - verify whether a minimum number of bytes remain in a zone | |
143 | * @f: file pointer. | |
144 | * @z: zone info pointer. | |
145 | * @required: minimum number of bytes that must remain in a zone. | |
146 | * | |
147 | * The caller must hold z->mutex. | |
148 | */ | |
149 | static bool zbd_zone_full(const struct fio_file *f, struct fio_zone_info *z, | |
150 | uint64_t required) | |
151 | { | |
152 | assert((required & 511) == 0); | |
153 | ||
b7694961 | 154 | return zbd_zone_swr(z) && |
ee3696bd | 155 | z->wp + required > z->start + f->zbd_info->zone_size; |
bfbdd35b BVA |
156 | } |
157 | ||
1f57803b DLM |
158 | static void zone_lock(struct thread_data *td, struct fio_zone_info *z) |
159 | { | |
160 | /* | |
161 | * Lock the io_u target zone. The zone will be unlocked if io_u offset | |
162 | * is changed or when io_u completes and zbd_put_io() executed. | |
163 | * To avoid multiple jobs doing asynchronous I/Os from deadlocking each | |
164 | * other waiting for zone locks when building an io_u batch, first | |
165 | * only trylock the zone. If the zone is already locked by another job, | |
166 | * process the currently queued I/Os so that I/O progress is made and | |
167 | * zones unlocked. | |
168 | */ | |
169 | if (pthread_mutex_trylock(&z->mutex) != 0) { | |
170 | if (!td_ioengine_flagged(td, FIO_SYNCIO)) | |
171 | io_u_quiesce(td); | |
172 | pthread_mutex_lock(&z->mutex); | |
173 | } | |
174 | } | |
175 | ||
bfbdd35b BVA |
176 | static bool is_valid_offset(const struct fio_file *f, uint64_t offset) |
177 | { | |
178 | return (uint64_t)(offset - f->file_offset) < f->io_size; | |
179 | } | |
180 | ||
181 | /* Verify whether direct I/O is used for all host-managed zoned drives. */ | |
182 | static bool zbd_using_direct_io(void) | |
183 | { | |
184 | struct thread_data *td; | |
185 | struct fio_file *f; | |
186 | int i, j; | |
187 | ||
188 | for_each_td(td, i) { | |
189 | if (td->o.odirect || !(td->o.td_ddir & TD_DDIR_WRITE)) | |
190 | continue; | |
191 | for_each_file(td, f, j) { | |
192 | if (f->zbd_info && | |
b7694961 | 193 | f->zbd_info->model == ZBD_HOST_MANAGED) |
bfbdd35b BVA |
194 | return false; |
195 | } | |
196 | } | |
197 | ||
198 | return true; | |
199 | } | |
200 | ||
201 | /* Whether or not the I/O range for f includes one or more sequential zones */ | |
202 | static bool zbd_is_seq_job(struct fio_file *f) | |
203 | { | |
204 | uint32_t zone_idx, zone_idx_b, zone_idx_e; | |
205 | ||
206 | assert(f->zbd_info); | |
207 | if (f->io_size == 0) | |
208 | return false; | |
209 | zone_idx_b = zbd_zone_idx(f, f->file_offset); | |
210 | zone_idx_e = zbd_zone_idx(f, f->file_offset + f->io_size - 1); | |
211 | for (zone_idx = zone_idx_b; zone_idx <= zone_idx_e; zone_idx++) | |
b7694961 | 212 | if (zbd_zone_swr(&f->zbd_info->zone_info[zone_idx])) |
bfbdd35b BVA |
213 | return true; |
214 | ||
215 | return false; | |
216 | } | |
217 | ||
218 | /* | |
219 | * Verify whether offset and size parameters are aligned with zone boundaries. | |
220 | */ | |
221 | static bool zbd_verify_sizes(void) | |
222 | { | |
223 | const struct fio_zone_info *z; | |
224 | struct thread_data *td; | |
225 | struct fio_file *f; | |
226 | uint64_t new_offset, new_end; | |
227 | uint32_t zone_idx; | |
228 | int i, j; | |
229 | ||
230 | for_each_td(td, i) { | |
231 | for_each_file(td, f, j) { | |
232 | if (!f->zbd_info) | |
233 | continue; | |
234 | if (f->file_offset >= f->real_file_size) | |
235 | continue; | |
236 | if (!zbd_is_seq_job(f)) | |
237 | continue; | |
4d37720a | 238 | |
fc52e449 DLM |
239 | if (!td->o.zone_size) { |
240 | td->o.zone_size = f->zbd_info->zone_size; | |
241 | if (!td->o.zone_size) { | |
242 | log_err("%s: invalid 0 zone size\n", | |
243 | f->file_name); | |
244 | return false; | |
245 | } | |
971d6a22 DLM |
246 | } else if (td->o.zone_size != f->zbd_info->zone_size) { |
247 | log_err("%s: job parameter zonesize %llu does not match disk zone size %llu.\n", | |
248 | f->file_name, (unsigned long long) td->o.zone_size, | |
249 | (unsigned long long) f->zbd_info->zone_size); | |
250 | return false; | |
fc52e449 DLM |
251 | } |
252 | ||
4d37720a DLM |
253 | if (td->o.zone_skip && |
254 | (td->o.zone_skip < td->o.zone_size || | |
255 | td->o.zone_skip % td->o.zone_size)) { | |
256 | log_err("%s: zoneskip %llu is not a multiple of the device zone size %llu.\n", | |
257 | f->file_name, (unsigned long long) td->o.zone_skip, | |
258 | (unsigned long long) td->o.zone_size); | |
259 | return false; | |
260 | } | |
261 | ||
bfbdd35b BVA |
262 | zone_idx = zbd_zone_idx(f, f->file_offset); |
263 | z = &f->zbd_info->zone_info[zone_idx]; | |
ee3696bd DLM |
264 | if (f->file_offset != z->start) { |
265 | new_offset = (z+1)->start; | |
bfbdd35b BVA |
266 | if (new_offset >= f->file_offset + f->io_size) { |
267 | log_info("%s: io_size must be at least one zone\n", | |
268 | f->file_name); | |
269 | return false; | |
270 | } | |
a0c84dd4 JA |
271 | log_info("%s: rounded up offset from %llu to %llu\n", |
272 | f->file_name, (unsigned long long) f->file_offset, | |
273 | (unsigned long long) new_offset); | |
bfbdd35b BVA |
274 | f->io_size -= (new_offset - f->file_offset); |
275 | f->file_offset = new_offset; | |
276 | } | |
277 | zone_idx = zbd_zone_idx(f, f->file_offset + f->io_size); | |
278 | z = &f->zbd_info->zone_info[zone_idx]; | |
ee3696bd | 279 | new_end = z->start; |
bfbdd35b BVA |
280 | if (f->file_offset + f->io_size != new_end) { |
281 | if (new_end <= f->file_offset) { | |
282 | log_info("%s: io_size must be at least one zone\n", | |
283 | f->file_name); | |
284 | return false; | |
285 | } | |
a0c84dd4 JA |
286 | log_info("%s: rounded down io_size from %llu to %llu\n", |
287 | f->file_name, (unsigned long long) f->io_size, | |
288 | (unsigned long long) new_end - f->file_offset); | |
bfbdd35b BVA |
289 | f->io_size = new_end - f->file_offset; |
290 | } | |
291 | } | |
292 | } | |
293 | ||
294 | return true; | |
295 | } | |
296 | ||
297 | static bool zbd_verify_bs(void) | |
298 | { | |
299 | struct thread_data *td; | |
300 | struct fio_file *f; | |
301 | uint32_t zone_size; | |
302 | int i, j, k; | |
303 | ||
304 | for_each_td(td, i) { | |
305 | for_each_file(td, f, j) { | |
306 | if (!f->zbd_info) | |
307 | continue; | |
308 | zone_size = f->zbd_info->zone_size; | |
309 | for (k = 0; k < ARRAY_SIZE(td->o.bs); k++) { | |
310 | if (td->o.verify != VERIFY_NONE && | |
ee3696bd | 311 | zone_size % td->o.bs[k] != 0) { |
bfbdd35b BVA |
312 | log_info("%s: block size %llu is not a divisor of the zone size %d\n", |
313 | f->file_name, td->o.bs[k], | |
ee3696bd | 314 | zone_size); |
bfbdd35b BVA |
315 | return false; |
316 | } | |
317 | } | |
318 | } | |
319 | } | |
320 | return true; | |
321 | } | |
322 | ||
bfbdd35b BVA |
323 | static int ilog2(uint64_t i) |
324 | { | |
325 | int log = -1; | |
326 | ||
327 | while (i) { | |
328 | i >>= 1; | |
329 | log++; | |
330 | } | |
331 | return log; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Initialize f->zbd_info for devices that are not zoned block devices. This | |
336 | * allows to execute a ZBD workload against a non-ZBD device. | |
337 | */ | |
338 | static int init_zone_info(struct thread_data *td, struct fio_file *f) | |
339 | { | |
340 | uint32_t nr_zones; | |
341 | struct fio_zone_info *p; | |
a4b7f12b | 342 | uint64_t zone_size = td->o.zone_size; |
bfbdd35b BVA |
343 | struct zoned_block_device_info *zbd_info = NULL; |
344 | pthread_mutexattr_t attr; | |
345 | int i; | |
346 | ||
a4b7f12b DLM |
347 | if (zone_size == 0) { |
348 | log_err("%s: Specifying the zone size is mandatory for regular block devices with --zonemode=zbd\n\n", | |
349 | f->file_name); | |
350 | return 1; | |
351 | } | |
352 | ||
353 | if (zone_size < 512) { | |
354 | log_err("%s: zone size must be at least 512 bytes for --zonemode=zbd\n\n", | |
355 | f->file_name); | |
356 | return 1; | |
357 | } | |
358 | ||
ee3696bd | 359 | nr_zones = (f->real_file_size + zone_size - 1) / zone_size; |
bfbdd35b BVA |
360 | zbd_info = scalloc(1, sizeof(*zbd_info) + |
361 | (nr_zones + 1) * sizeof(zbd_info->zone_info[0])); | |
362 | if (!zbd_info) | |
363 | return -ENOMEM; | |
364 | ||
365 | pthread_mutexattr_init(&attr); | |
366 | pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); | |
367 | pthread_mutexattr_setpshared(&attr, true); | |
368 | pthread_mutex_init(&zbd_info->mutex, &attr); | |
369 | zbd_info->refcount = 1; | |
370 | p = &zbd_info->zone_info[0]; | |
371 | for (i = 0; i < nr_zones; i++, p++) { | |
372 | pthread_mutex_init(&p->mutex, &attr); | |
373 | p->start = i * zone_size; | |
374 | p->wp = p->start + zone_size; | |
b7694961 DLM |
375 | p->type = ZBD_ZONE_TYPE_SWR; |
376 | p->cond = ZBD_ZONE_COND_EMPTY; | |
bfbdd35b BVA |
377 | } |
378 | /* a sentinel */ | |
379 | p->start = nr_zones * zone_size; | |
380 | ||
381 | f->zbd_info = zbd_info; | |
382 | f->zbd_info->zone_size = zone_size; | |
383 | f->zbd_info->zone_size_log2 = is_power_of_2(zone_size) ? | |
ebc403fe | 384 | ilog2(zone_size) : 0; |
bfbdd35b BVA |
385 | f->zbd_info->nr_zones = nr_zones; |
386 | pthread_mutexattr_destroy(&attr); | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /* | |
b7694961 DLM |
391 | * Maximum number of zones to report in one operation. |
392 | */ | |
393 | #define ZBD_REPORT_MAX_ZONES 8192U | |
394 | ||
395 | /* | |
396 | * Parse the device zone report and store it in f->zbd_info. Must be called | |
397 | * only for devices that are zoned, namely those with a model != ZBD_NONE. | |
bfbdd35b BVA |
398 | */ |
399 | static int parse_zone_info(struct thread_data *td, struct fio_file *f) | |
400 | { | |
b7694961 DLM |
401 | int nr_zones, nrz; |
402 | struct zbd_zone *zones, *z; | |
bfbdd35b | 403 | struct fio_zone_info *p; |
b7694961 | 404 | uint64_t zone_size, offset; |
bfbdd35b BVA |
405 | struct zoned_block_device_info *zbd_info = NULL; |
406 | pthread_mutexattr_t attr; | |
b7694961 | 407 | int i, j, ret = 0; |
bfbdd35b BVA |
408 | |
409 | pthread_mutexattr_init(&attr); | |
410 | pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); | |
411 | pthread_mutexattr_setpshared(&attr, true); | |
412 | ||
b7694961 DLM |
413 | zones = calloc(ZBD_REPORT_MAX_ZONES, sizeof(struct zbd_zone)); |
414 | if (!zones) | |
bfbdd35b BVA |
415 | goto out; |
416 | ||
b7694961 DLM |
417 | nrz = zbd_report_zones(td, f, 0, zones, ZBD_REPORT_MAX_ZONES); |
418 | if (nrz < 0) { | |
419 | ret = nrz; | |
420 | log_info("fio: report zones (offset 0) failed for %s (%d).\n", | |
421 | f->file_name, -ret); | |
422 | goto out; | |
bfbdd35b BVA |
423 | } |
424 | ||
b7694961 | 425 | zone_size = zones[0].len; |
ee3696bd | 426 | nr_zones = (f->real_file_size + zone_size - 1) / zone_size; |
bfbdd35b BVA |
427 | |
428 | if (td->o.zone_size == 0) { | |
ee3696bd DLM |
429 | td->o.zone_size = zone_size; |
430 | } else if (td->o.zone_size != zone_size) { | |
4580ff92 DLM |
431 | log_err("fio: %s job parameter zonesize %llu does not match disk zone size %llu.\n", |
432 | f->file_name, (unsigned long long) td->o.zone_size, | |
a0c84dd4 | 433 | (unsigned long long) zone_size); |
bfbdd35b | 434 | ret = -EINVAL; |
b7694961 | 435 | goto out; |
bfbdd35b BVA |
436 | } |
437 | ||
a0c84dd4 JA |
438 | dprint(FD_ZBD, "Device %s has %d zones of size %llu KB\n", f->file_name, |
439 | nr_zones, (unsigned long long) zone_size / 1024); | |
bfbdd35b BVA |
440 | |
441 | zbd_info = scalloc(1, sizeof(*zbd_info) + | |
442 | (nr_zones + 1) * sizeof(zbd_info->zone_info[0])); | |
443 | ret = -ENOMEM; | |
444 | if (!zbd_info) | |
b7694961 | 445 | goto out; |
bfbdd35b BVA |
446 | pthread_mutex_init(&zbd_info->mutex, &attr); |
447 | zbd_info->refcount = 1; | |
448 | p = &zbd_info->zone_info[0]; | |
b7694961 DLM |
449 | for (offset = 0, j = 0; j < nr_zones;) { |
450 | z = &zones[0]; | |
451 | for (i = 0; i < nrz; i++, j++, z++, p++) { | |
bfbdd35b | 452 | pthread_mutex_init(&p->mutex, &attr); |
b7694961 | 453 | p->start = z->start; |
bfbdd35b | 454 | switch (z->cond) { |
b7694961 DLM |
455 | case ZBD_ZONE_COND_NOT_WP: |
456 | case ZBD_ZONE_COND_FULL: | |
ee3696bd | 457 | p->wp = p->start + zone_size; |
bfbdd35b BVA |
458 | break; |
459 | default: | |
460 | assert(z->start <= z->wp); | |
b7694961 DLM |
461 | assert(z->wp <= z->start + zone_size); |
462 | p->wp = z->wp; | |
bfbdd35b BVA |
463 | break; |
464 | } | |
465 | p->type = z->type; | |
466 | p->cond = z->cond; | |
467 | if (j > 0 && p->start != p[-1].start + zone_size) { | |
468 | log_info("%s: invalid zone data\n", | |
469 | f->file_name); | |
470 | ret = -EINVAL; | |
b7694961 | 471 | goto out; |
bfbdd35b BVA |
472 | } |
473 | } | |
474 | z--; | |
b7694961 | 475 | offset = z->start + z->len; |
bfbdd35b BVA |
476 | if (j >= nr_zones) |
477 | break; | |
b7694961 DLM |
478 | nrz = zbd_report_zones(td, f, offset, |
479 | zones, ZBD_REPORT_MAX_ZONES); | |
480 | if (nrz < 0) { | |
481 | ret = nrz; | |
482 | log_info("fio: report zones (offset %llu) failed for %s (%d).\n", | |
483 | (unsigned long long)offset, | |
484 | f->file_name, -ret); | |
485 | goto out; | |
bfbdd35b BVA |
486 | } |
487 | } | |
b7694961 | 488 | |
bfbdd35b | 489 | /* a sentinel */ |
b7694961 | 490 | zbd_info->zone_info[nr_zones].start = offset; |
bfbdd35b BVA |
491 | |
492 | f->zbd_info = zbd_info; | |
493 | f->zbd_info->zone_size = zone_size; | |
494 | f->zbd_info->zone_size_log2 = is_power_of_2(zone_size) ? | |
ebc403fe | 495 | ilog2(zone_size) : 0; |
bfbdd35b BVA |
496 | f->zbd_info->nr_zones = nr_zones; |
497 | zbd_info = NULL; | |
498 | ret = 0; | |
499 | ||
bfbdd35b | 500 | out: |
b7694961 DLM |
501 | sfree(zbd_info); |
502 | free(zones); | |
bfbdd35b BVA |
503 | pthread_mutexattr_destroy(&attr); |
504 | return ret; | |
505 | } | |
506 | ||
507 | /* | |
508 | * Allocate zone information and store it into f->zbd_info if zonemode=zbd. | |
509 | * | |
510 | * Returns 0 upon success and a negative error code upon failure. | |
511 | */ | |
379e5f09 | 512 | static int zbd_create_zone_info(struct thread_data *td, struct fio_file *f) |
bfbdd35b | 513 | { |
b7694961 DLM |
514 | enum zbd_zoned_model zbd_model; |
515 | int ret; | |
bfbdd35b BVA |
516 | |
517 | assert(td->o.zone_mode == ZONE_MODE_ZBD); | |
518 | ||
b7694961 DLM |
519 | ret = zbd_get_zoned_model(td, f, &zbd_model); |
520 | if (ret) | |
521 | return ret; | |
522 | ||
bfbdd35b | 523 | switch (zbd_model) { |
b7694961 DLM |
524 | case ZBD_IGNORE: |
525 | return 0; | |
526 | case ZBD_HOST_AWARE: | |
527 | case ZBD_HOST_MANAGED: | |
bfbdd35b BVA |
528 | ret = parse_zone_info(td, f); |
529 | break; | |
b7694961 | 530 | case ZBD_NONE: |
bfbdd35b BVA |
531 | ret = init_zone_info(td, f); |
532 | break; | |
b7694961 DLM |
533 | default: |
534 | td_verror(td, EINVAL, "Unsupported zoned model"); | |
535 | log_err("Unsupported zoned model\n"); | |
536 | return -EINVAL; | |
bfbdd35b | 537 | } |
b7694961 | 538 | |
bfbdd35b BVA |
539 | if (ret == 0) |
540 | f->zbd_info->model = zbd_model; | |
541 | return ret; | |
542 | } | |
543 | ||
544 | void zbd_free_zone_info(struct fio_file *f) | |
545 | { | |
546 | uint32_t refcount; | |
547 | ||
548 | if (!f->zbd_info) | |
549 | return; | |
550 | ||
551 | pthread_mutex_lock(&f->zbd_info->mutex); | |
552 | refcount = --f->zbd_info->refcount; | |
553 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
554 | ||
555 | assert((int32_t)refcount >= 0); | |
556 | if (refcount == 0) | |
557 | sfree(f->zbd_info); | |
558 | f->zbd_info = NULL; | |
559 | } | |
560 | ||
561 | /* | |
562 | * Initialize f->zbd_info. | |
563 | * | |
564 | * Returns 0 upon success and a negative error code upon failure. | |
565 | * | |
566 | * Note: this function can only work correctly if it is called before the first | |
567 | * fio fork() call. | |
568 | */ | |
569 | static int zbd_init_zone_info(struct thread_data *td, struct fio_file *file) | |
570 | { | |
571 | struct thread_data *td2; | |
572 | struct fio_file *f2; | |
573 | int i, j, ret; | |
574 | ||
575 | for_each_td(td2, i) { | |
576 | for_each_file(td2, f2, j) { | |
577 | if (td2 == td && f2 == file) | |
578 | continue; | |
579 | if (!f2->zbd_info || | |
580 | strcmp(f2->file_name, file->file_name) != 0) | |
581 | continue; | |
582 | file->zbd_info = f2->zbd_info; | |
583 | file->zbd_info->refcount++; | |
584 | return 0; | |
585 | } | |
586 | } | |
587 | ||
588 | ret = zbd_create_zone_info(td, file); | |
589 | if (ret < 0) | |
c5837eec | 590 | td_verror(td, -ret, "zbd_create_zone_info() failed"); |
bfbdd35b BVA |
591 | return ret; |
592 | } | |
593 | ||
594 | int zbd_init(struct thread_data *td) | |
595 | { | |
596 | struct fio_file *f; | |
597 | int i; | |
598 | ||
599 | for_each_file(td, f, i) { | |
a4b7f12b | 600 | if (zbd_init_zone_info(td, f)) |
bfbdd35b | 601 | return 1; |
bfbdd35b BVA |
602 | } |
603 | ||
604 | if (!zbd_using_direct_io()) { | |
605 | log_err("Using direct I/O is mandatory for writing to ZBD drives\n\n"); | |
606 | return 1; | |
607 | } | |
608 | ||
609 | if (!zbd_verify_sizes()) | |
610 | return 1; | |
611 | ||
612 | if (!zbd_verify_bs()) | |
613 | return 1; | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
618 | /** | |
619 | * zbd_reset_range - reset zones for a range of sectors | |
620 | * @td: FIO thread data. | |
621 | * @f: Fio file for which to reset zones | |
622 | * @sector: Starting sector in units of 512 bytes | |
623 | * @nr_sectors: Number of sectors in units of 512 bytes | |
624 | * | |
625 | * Returns 0 upon success and a negative error code upon failure. | |
626 | */ | |
b7694961 | 627 | static int zbd_reset_range(struct thread_data *td, struct fio_file *f, |
ee3696bd | 628 | uint64_t offset, uint64_t length) |
bfbdd35b | 629 | { |
bfbdd35b BVA |
630 | uint32_t zone_idx_b, zone_idx_e; |
631 | struct fio_zone_info *zb, *ze, *z; | |
632 | int ret = 0; | |
633 | ||
ee3696bd | 634 | assert(is_valid_offset(f, offset + length - 1)); |
b7694961 | 635 | |
bfbdd35b | 636 | switch (f->zbd_info->model) { |
b7694961 DLM |
637 | case ZBD_HOST_AWARE: |
638 | case ZBD_HOST_MANAGED: | |
639 | ret = zbd_reset_wp(td, f, offset, length); | |
640 | if (ret < 0) | |
bfbdd35b | 641 | return ret; |
bfbdd35b | 642 | break; |
b7694961 | 643 | default: |
bfbdd35b BVA |
644 | break; |
645 | } | |
646 | ||
ee3696bd | 647 | zone_idx_b = zbd_zone_idx(f, offset); |
bfbdd35b | 648 | zb = &f->zbd_info->zone_info[zone_idx_b]; |
ee3696bd | 649 | zone_idx_e = zbd_zone_idx(f, offset + length); |
bfbdd35b BVA |
650 | ze = &f->zbd_info->zone_info[zone_idx_e]; |
651 | for (z = zb; z < ze; z++) { | |
652 | pthread_mutex_lock(&z->mutex); | |
a7c2b6fc BVA |
653 | pthread_mutex_lock(&f->zbd_info->mutex); |
654 | f->zbd_info->sectors_with_data -= z->wp - z->start; | |
655 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
bfbdd35b BVA |
656 | z->wp = z->start; |
657 | z->verify_block = 0; | |
658 | pthread_mutex_unlock(&z->mutex); | |
659 | } | |
660 | ||
fd5d733f BVA |
661 | td->ts.nr_zone_resets += ze - zb; |
662 | ||
bfbdd35b BVA |
663 | return ret; |
664 | } | |
665 | ||
a0c84dd4 JA |
666 | static unsigned int zbd_zone_nr(struct zoned_block_device_info *zbd_info, |
667 | struct fio_zone_info *zone) | |
668 | { | |
089ddd95 | 669 | return zone - zbd_info->zone_info; |
a0c84dd4 JA |
670 | } |
671 | ||
bfbdd35b BVA |
672 | /** |
673 | * zbd_reset_zone - reset the write pointer of a single zone | |
674 | * @td: FIO thread data. | |
675 | * @f: FIO file associated with the disk for which to reset a write pointer. | |
676 | * @z: Zone to reset. | |
677 | * | |
678 | * Returns 0 upon success and a negative error code upon failure. | |
679 | */ | |
b7694961 | 680 | static int zbd_reset_zone(struct thread_data *td, struct fio_file *f, |
bfbdd35b BVA |
681 | struct fio_zone_info *z) |
682 | { | |
a0c84dd4 JA |
683 | dprint(FD_ZBD, "%s: resetting wp of zone %u.\n", f->file_name, |
684 | zbd_zone_nr(f->zbd_info, z)); | |
d60be7d5 DLM |
685 | |
686 | return zbd_reset_range(td, f, z->start, (z+1)->start - z->start); | |
bfbdd35b BVA |
687 | } |
688 | ||
689 | /* | |
690 | * Reset a range of zones. Returns 0 upon success and 1 upon failure. | |
691 | * @td: fio thread data. | |
692 | * @f: fio file for which to reset zones | |
693 | * @zb: first zone to reset. | |
694 | * @ze: first zone not to reset. | |
695 | * @all_zones: whether to reset all zones or only those zones for which the | |
696 | * write pointer is not a multiple of td->o.min_bs[DDIR_WRITE]. | |
697 | */ | |
698 | static int zbd_reset_zones(struct thread_data *td, struct fio_file *f, | |
699 | struct fio_zone_info *const zb, | |
700 | struct fio_zone_info *const ze, bool all_zones) | |
701 | { | |
4803b841 | 702 | struct fio_zone_info *z; |
ee3696bd | 703 | const uint32_t min_bs = td->o.min_bs[DDIR_WRITE]; |
bfbdd35b BVA |
704 | bool reset_wp; |
705 | int res = 0; | |
706 | ||
adc6adcb DLM |
707 | assert(min_bs); |
708 | ||
a0c84dd4 JA |
709 | dprint(FD_ZBD, "%s: examining zones %u .. %u\n", f->file_name, |
710 | zbd_zone_nr(f->zbd_info, zb), zbd_zone_nr(f->zbd_info, ze)); | |
bfbdd35b | 711 | for (z = zb; z < ze; z++) { |
b7694961 | 712 | if (!zbd_zone_swr(z)) |
1f57803b DLM |
713 | continue; |
714 | zone_lock(td, z); | |
715 | reset_wp = all_zones ? z->wp != z->start : | |
716 | (td->o.td_ddir & TD_DDIR_WRITE) && | |
717 | z->wp % min_bs != 0; | |
718 | if (reset_wp) { | |
719 | dprint(FD_ZBD, "%s: resetting zone %u\n", | |
720 | f->file_name, | |
721 | zbd_zone_nr(f->zbd_info, z)); | |
722 | if (zbd_reset_zone(td, f, z) < 0) | |
723 | res = 1; | |
bfbdd35b | 724 | } |
bfbdd35b | 725 | pthread_mutex_unlock(&z->mutex); |
4803b841 | 726 | } |
bfbdd35b BVA |
727 | |
728 | return res; | |
729 | } | |
730 | ||
a7c2b6fc BVA |
731 | /* |
732 | * Reset zbd_info.write_cnt, the counter that counts down towards the next | |
733 | * zone reset. | |
734 | */ | |
735 | static void zbd_reset_write_cnt(const struct thread_data *td, | |
736 | const struct fio_file *f) | |
737 | { | |
738 | assert(0 <= td->o.zrf.u.f && td->o.zrf.u.f <= 1); | |
739 | ||
740 | pthread_mutex_lock(&f->zbd_info->mutex); | |
741 | f->zbd_info->write_cnt = td->o.zrf.u.f ? | |
742 | min(1.0 / td->o.zrf.u.f, 0.0 + UINT_MAX) : UINT_MAX; | |
743 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
744 | } | |
745 | ||
746 | static bool zbd_dec_and_reset_write_cnt(const struct thread_data *td, | |
747 | const struct fio_file *f) | |
748 | { | |
749 | uint32_t write_cnt = 0; | |
750 | ||
751 | pthread_mutex_lock(&f->zbd_info->mutex); | |
752 | assert(f->zbd_info->write_cnt); | |
753 | if (f->zbd_info->write_cnt) | |
754 | write_cnt = --f->zbd_info->write_cnt; | |
755 | if (write_cnt == 0) | |
756 | zbd_reset_write_cnt(td, f); | |
757 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
758 | ||
759 | return write_cnt == 0; | |
760 | } | |
761 | ||
91d25131 BVA |
762 | enum swd_action { |
763 | CHECK_SWD, | |
764 | SET_SWD, | |
765 | }; | |
766 | ||
767 | /* Calculate the number of sectors with data (swd) and perform action 'a' */ | |
768 | static uint64_t zbd_process_swd(const struct fio_file *f, enum swd_action a) | |
615555bb | 769 | { |
615555bb BVA |
770 | struct fio_zone_info *zb, *ze, *z; |
771 | uint64_t swd = 0; | |
772 | ||
773 | zb = &f->zbd_info->zone_info[zbd_zone_idx(f, f->file_offset)]; | |
774 | ze = &f->zbd_info->zone_info[zbd_zone_idx(f, f->file_offset + | |
775 | f->io_size)]; | |
776 | for (z = zb; z < ze; z++) { | |
777 | pthread_mutex_lock(&z->mutex); | |
778 | swd += z->wp - z->start; | |
779 | } | |
780 | pthread_mutex_lock(&f->zbd_info->mutex); | |
91d25131 BVA |
781 | switch (a) { |
782 | case CHECK_SWD: | |
783 | assert(f->zbd_info->sectors_with_data == swd); | |
784 | break; | |
785 | case SET_SWD: | |
786 | f->zbd_info->sectors_with_data = swd; | |
787 | break; | |
788 | } | |
615555bb BVA |
789 | pthread_mutex_unlock(&f->zbd_info->mutex); |
790 | for (z = zb; z < ze; z++) | |
791 | pthread_mutex_unlock(&z->mutex); | |
91d25131 BVA |
792 | |
793 | return swd; | |
794 | } | |
795 | ||
796 | /* | |
797 | * The swd check is useful for debugging but takes too much time to leave | |
798 | * it enabled all the time. Hence it is disabled by default. | |
799 | */ | |
800 | static const bool enable_check_swd = false; | |
801 | ||
802 | /* Check whether the value of zbd_info.sectors_with_data is correct. */ | |
803 | static void zbd_check_swd(const struct fio_file *f) | |
804 | { | |
805 | if (!enable_check_swd) | |
806 | return; | |
807 | ||
808 | zbd_process_swd(f, CHECK_SWD); | |
809 | } | |
810 | ||
811 | static void zbd_init_swd(struct fio_file *f) | |
812 | { | |
813 | uint64_t swd; | |
814 | ||
409a4f29 NA |
815 | if (!enable_check_swd) |
816 | return; | |
817 | ||
91d25131 BVA |
818 | swd = zbd_process_swd(f, SET_SWD); |
819 | dprint(FD_ZBD, "%s(%s): swd = %" PRIu64 "\n", __func__, f->file_name, | |
820 | swd); | |
615555bb BVA |
821 | } |
822 | ||
bfbdd35b BVA |
823 | void zbd_file_reset(struct thread_data *td, struct fio_file *f) |
824 | { | |
91d25131 | 825 | struct fio_zone_info *zb, *ze; |
bfbdd35b BVA |
826 | uint32_t zone_idx_e; |
827 | ||
828 | if (!f->zbd_info) | |
829 | return; | |
830 | ||
831 | zb = &f->zbd_info->zone_info[zbd_zone_idx(f, f->file_offset)]; | |
832 | zone_idx_e = zbd_zone_idx(f, f->file_offset + f->io_size); | |
833 | ze = &f->zbd_info->zone_info[zone_idx_e]; | |
91d25131 | 834 | zbd_init_swd(f); |
bfbdd35b BVA |
835 | /* |
836 | * If data verification is enabled reset the affected zones before | |
837 | * writing any data to avoid that a zone reset has to be issued while | |
838 | * writing data, which causes data loss. | |
839 | */ | |
840 | zbd_reset_zones(td, f, zb, ze, td->o.verify != VERIFY_NONE && | |
841 | (td->o.td_ddir & TD_DDIR_WRITE) && | |
842 | td->runstate != TD_VERIFYING); | |
a7c2b6fc | 843 | zbd_reset_write_cnt(td, f); |
bfbdd35b BVA |
844 | } |
845 | ||
59b07544 BVA |
846 | /* The caller must hold f->zbd_info->mutex. */ |
847 | static bool is_zone_open(const struct thread_data *td, const struct fio_file *f, | |
848 | unsigned int zone_idx) | |
849 | { | |
850 | struct zoned_block_device_info *zbdi = f->zbd_info; | |
851 | int i; | |
852 | ||
853 | assert(td->o.max_open_zones <= ARRAY_SIZE(zbdi->open_zones)); | |
854 | assert(zbdi->num_open_zones <= td->o.max_open_zones); | |
855 | ||
856 | for (i = 0; i < zbdi->num_open_zones; i++) | |
857 | if (zbdi->open_zones[i] == zone_idx) | |
858 | return true; | |
859 | ||
860 | return false; | |
861 | } | |
862 | ||
863 | /* | |
864 | * Open a ZBD zone if it was not yet open. Returns true if either the zone was | |
865 | * already open or if opening a new zone is allowed. Returns false if the zone | |
866 | * was not yet open and opening a new zone would cause the zone limit to be | |
867 | * exceeded. | |
868 | */ | |
869 | static bool zbd_open_zone(struct thread_data *td, const struct io_u *io_u, | |
870 | uint32_t zone_idx) | |
871 | { | |
872 | const uint32_t min_bs = td->o.min_bs[DDIR_WRITE]; | |
873 | const struct fio_file *f = io_u->file; | |
874 | struct fio_zone_info *z = &f->zbd_info->zone_info[zone_idx]; | |
875 | bool res = true; | |
876 | ||
b7694961 | 877 | if (z->cond == ZBD_ZONE_COND_OFFLINE) |
59b07544 BVA |
878 | return false; |
879 | ||
880 | /* | |
881 | * Skip full zones with data verification enabled because resetting a | |
882 | * zone causes data loss and hence causes verification to fail. | |
883 | */ | |
884 | if (td->o.verify != VERIFY_NONE && zbd_zone_full(f, z, min_bs)) | |
885 | return false; | |
886 | ||
887 | /* Zero means no limit */ | |
888 | if (!td->o.max_open_zones) | |
889 | return true; | |
890 | ||
891 | pthread_mutex_lock(&f->zbd_info->mutex); | |
892 | if (is_zone_open(td, f, zone_idx)) | |
893 | goto out; | |
894 | res = false; | |
895 | if (f->zbd_info->num_open_zones >= td->o.max_open_zones) | |
896 | goto out; | |
897 | dprint(FD_ZBD, "%s: opening zone %d\n", f->file_name, zone_idx); | |
898 | f->zbd_info->open_zones[f->zbd_info->num_open_zones++] = zone_idx; | |
899 | z->open = 1; | |
900 | res = true; | |
901 | ||
902 | out: | |
903 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
904 | return res; | |
905 | } | |
906 | ||
907 | /* The caller must hold f->zbd_info->mutex */ | |
908 | static void zbd_close_zone(struct thread_data *td, const struct fio_file *f, | |
909 | unsigned int open_zone_idx) | |
910 | { | |
911 | uint32_t zone_idx; | |
912 | ||
913 | assert(open_zone_idx < f->zbd_info->num_open_zones); | |
914 | zone_idx = f->zbd_info->open_zones[open_zone_idx]; | |
915 | memmove(f->zbd_info->open_zones + open_zone_idx, | |
916 | f->zbd_info->open_zones + open_zone_idx + 1, | |
b7694961 | 917 | (ZBD_MAX_OPEN_ZONES - (open_zone_idx + 1)) * |
59b07544 BVA |
918 | sizeof(f->zbd_info->open_zones[0])); |
919 | f->zbd_info->num_open_zones--; | |
920 | f->zbd_info->zone_info[zone_idx].open = 0; | |
921 | } | |
922 | ||
6463db6c AD |
923 | /* Anything goes as long as it is not a constant. */ |
924 | static uint32_t pick_random_zone_idx(const struct fio_file *f, | |
925 | const struct io_u *io_u) | |
926 | { | |
927 | return io_u->offset * f->zbd_info->num_open_zones / f->real_file_size; | |
928 | } | |
929 | ||
59b07544 BVA |
930 | /* |
931 | * Modify the offset of an I/O unit that does not refer to an open zone such | |
932 | * that it refers to an open zone. Close an open zone and open a new zone if | |
933 | * necessary. This algorithm can only work correctly if all write pointers are | |
934 | * a multiple of the fio block size. The caller must neither hold z->mutex | |
935 | * nor f->zbd_info->mutex. Returns with z->mutex held upon success. | |
936 | */ | |
379e5f09 BVA |
937 | static struct fio_zone_info *zbd_convert_to_open_zone(struct thread_data *td, |
938 | struct io_u *io_u) | |
59b07544 BVA |
939 | { |
940 | const uint32_t min_bs = td->o.min_bs[io_u->ddir]; | |
941 | const struct fio_file *f = io_u->file; | |
942 | struct fio_zone_info *z; | |
943 | unsigned int open_zone_idx = -1; | |
944 | uint32_t zone_idx, new_zone_idx; | |
945 | int i; | |
946 | ||
947 | assert(is_valid_offset(f, io_u->offset)); | |
948 | ||
949 | if (td->o.max_open_zones) { | |
950 | /* | |
951 | * This statement accesses f->zbd_info->open_zones[] on purpose | |
952 | * without locking. | |
953 | */ | |
6463db6c | 954 | zone_idx = f->zbd_info->open_zones[pick_random_zone_idx(f, io_u)]; |
59b07544 BVA |
955 | } else { |
956 | zone_idx = zbd_zone_idx(f, io_u->offset); | |
957 | } | |
958 | dprint(FD_ZBD, "%s(%s): starting from zone %d (offset %lld, buflen %lld)\n", | |
959 | __func__, f->file_name, zone_idx, io_u->offset, io_u->buflen); | |
960 | ||
961 | /* | |
962 | * Since z->mutex is the outer lock and f->zbd_info->mutex the inner | |
963 | * lock it can happen that the state of the zone with index zone_idx | |
964 | * has changed after 'z' has been assigned and before f->zbd_info->mutex | |
965 | * has been obtained. Hence the loop. | |
966 | */ | |
967 | for (;;) { | |
6463db6c AD |
968 | uint32_t tmp_idx; |
969 | ||
59b07544 BVA |
970 | z = &f->zbd_info->zone_info[zone_idx]; |
971 | ||
b27aef6a | 972 | zone_lock(td, z); |
59b07544 BVA |
973 | pthread_mutex_lock(&f->zbd_info->mutex); |
974 | if (td->o.max_open_zones == 0) | |
975 | goto examine_zone; | |
976 | if (f->zbd_info->num_open_zones == 0) { | |
977 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
978 | pthread_mutex_unlock(&z->mutex); | |
979 | dprint(FD_ZBD, "%s(%s): no zones are open\n", | |
980 | __func__, f->file_name); | |
981 | return NULL; | |
982 | } | |
6463db6c AD |
983 | |
984 | /* | |
985 | * List of opened zones is per-device, shared across all threads. | |
986 | * Start with quasi-random candidate zone. | |
987 | * Ignore zones which don't belong to thread's offset/size area. | |
988 | */ | |
989 | open_zone_idx = pick_random_zone_idx(f, io_u); | |
59b07544 | 990 | assert(open_zone_idx < f->zbd_info->num_open_zones); |
6463db6c AD |
991 | tmp_idx = open_zone_idx; |
992 | for (i = 0; i < f->zbd_info->num_open_zones; i++) { | |
993 | uint32_t tmpz; | |
994 | ||
995 | if (tmp_idx >= f->zbd_info->num_open_zones) | |
996 | tmp_idx = 0; | |
997 | tmpz = f->zbd_info->open_zones[tmp_idx]; | |
998 | ||
999 | if (is_valid_offset(f, f->zbd_info->zone_info[tmpz].start)) { | |
1000 | open_zone_idx = tmp_idx; | |
1001 | goto found_candidate_zone; | |
1002 | } | |
1003 | ||
1004 | tmp_idx++; | |
1005 | } | |
1006 | ||
1007 | dprint(FD_ZBD, "%s(%s): no candidate zone\n", | |
1008 | __func__, f->file_name); | |
adc6adcb DLM |
1009 | pthread_mutex_unlock(&f->zbd_info->mutex); |
1010 | pthread_mutex_unlock(&z->mutex); | |
6463db6c AD |
1011 | return NULL; |
1012 | ||
1013 | found_candidate_zone: | |
59b07544 BVA |
1014 | new_zone_idx = f->zbd_info->open_zones[open_zone_idx]; |
1015 | if (new_zone_idx == zone_idx) | |
1016 | break; | |
1017 | zone_idx = new_zone_idx; | |
1018 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
1019 | pthread_mutex_unlock(&z->mutex); | |
1020 | } | |
1021 | ||
1022 | /* Both z->mutex and f->zbd_info->mutex are held. */ | |
1023 | ||
1024 | examine_zone: | |
ee3696bd | 1025 | if (z->wp + min_bs <= (z+1)->start) { |
59b07544 BVA |
1026 | pthread_mutex_unlock(&f->zbd_info->mutex); |
1027 | goto out; | |
1028 | } | |
1029 | dprint(FD_ZBD, "%s(%s): closing zone %d\n", __func__, f->file_name, | |
1030 | zone_idx); | |
1031 | if (td->o.max_open_zones) | |
1032 | zbd_close_zone(td, f, open_zone_idx); | |
1033 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
1034 | ||
1035 | /* Only z->mutex is held. */ | |
1036 | ||
1037 | /* Zone 'z' is full, so try to open a new zone. */ | |
1038 | for (i = f->io_size / f->zbd_info->zone_size; i > 0; i--) { | |
1039 | zone_idx++; | |
1040 | pthread_mutex_unlock(&z->mutex); | |
1041 | z++; | |
ee3696bd | 1042 | if (!is_valid_offset(f, z->start)) { |
59b07544 BVA |
1043 | /* Wrap-around. */ |
1044 | zone_idx = zbd_zone_idx(f, f->file_offset); | |
1045 | z = &f->zbd_info->zone_info[zone_idx]; | |
1046 | } | |
ee3696bd | 1047 | assert(is_valid_offset(f, z->start)); |
b27aef6a | 1048 | zone_lock(td, z); |
59b07544 BVA |
1049 | if (z->open) |
1050 | continue; | |
1051 | if (zbd_open_zone(td, io_u, zone_idx)) | |
1052 | goto out; | |
1053 | } | |
1054 | ||
1055 | /* Only z->mutex is held. */ | |
1056 | ||
1057 | /* Check whether the write fits in any of the already opened zones. */ | |
1058 | pthread_mutex_lock(&f->zbd_info->mutex); | |
1059 | for (i = 0; i < f->zbd_info->num_open_zones; i++) { | |
1060 | zone_idx = f->zbd_info->open_zones[i]; | |
1061 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
1062 | pthread_mutex_unlock(&z->mutex); | |
1063 | ||
1064 | z = &f->zbd_info->zone_info[zone_idx]; | |
1065 | ||
b27aef6a | 1066 | zone_lock(td, z); |
ee3696bd | 1067 | if (z->wp + min_bs <= (z+1)->start) |
59b07544 BVA |
1068 | goto out; |
1069 | pthread_mutex_lock(&f->zbd_info->mutex); | |
1070 | } | |
1071 | pthread_mutex_unlock(&f->zbd_info->mutex); | |
1072 | pthread_mutex_unlock(&z->mutex); | |
1073 | dprint(FD_ZBD, "%s(%s): did not open another zone\n", __func__, | |
1074 | f->file_name); | |
1075 | return NULL; | |
1076 | ||
1077 | out: | |
1078 | dprint(FD_ZBD, "%s(%s): returning zone %d\n", __func__, f->file_name, | |
1079 | zone_idx); | |
ee3696bd | 1080 | io_u->offset = z->start; |
59b07544 BVA |
1081 | return z; |
1082 | } | |
1083 | ||
bfbdd35b | 1084 | /* The caller must hold z->mutex. */ |
59b07544 BVA |
1085 | static struct fio_zone_info *zbd_replay_write_order(struct thread_data *td, |
1086 | struct io_u *io_u, | |
1087 | struct fio_zone_info *z) | |
bfbdd35b BVA |
1088 | { |
1089 | const struct fio_file *f = io_u->file; | |
1090 | const uint32_t min_bs = td->o.min_bs[DDIR_WRITE]; | |
1091 | ||
59b07544 BVA |
1092 | if (!zbd_open_zone(td, io_u, z - f->zbd_info->zone_info)) { |
1093 | pthread_mutex_unlock(&z->mutex); | |
1094 | z = zbd_convert_to_open_zone(td, io_u); | |
1095 | assert(z); | |
1096 | } | |
1097 | ||
bfbdd35b | 1098 | if (z->verify_block * min_bs >= f->zbd_info->zone_size) |
a0c84dd4 JA |
1099 | log_err("%s: %d * %d >= %llu\n", f->file_name, z->verify_block, |
1100 | min_bs, (unsigned long long) f->zbd_info->zone_size); | |
ee3696bd | 1101 | io_u->offset = z->start + z->verify_block++ * min_bs; |
59b07544 | 1102 | return z; |
bfbdd35b BVA |
1103 | } |
1104 | ||
1105 | /* | |
1106 | * Find another zone for which @io_u fits below the write pointer. Start | |
1107 | * searching in zones @zb + 1 .. @zl and continue searching in zones | |
1108 | * @zf .. @zb - 1. | |
1109 | * | |
1110 | * Either returns NULL or returns a zone pointer and holds the mutex for that | |
1111 | * zone. | |
1112 | */ | |
1113 | static struct fio_zone_info * | |
1114 | zbd_find_zone(struct thread_data *td, struct io_u *io_u, | |
1115 | struct fio_zone_info *zb, struct fio_zone_info *zl) | |
1116 | { | |
1117 | const uint32_t min_bs = td->o.min_bs[io_u->ddir]; | |
1118 | const struct fio_file *f = io_u->file; | |
1119 | struct fio_zone_info *z1, *z2; | |
1120 | const struct fio_zone_info *const zf = | |
1121 | &f->zbd_info->zone_info[zbd_zone_idx(f, f->file_offset)]; | |
1122 | ||
1123 | /* | |
1124 | * Skip to the next non-empty zone in case of sequential I/O and to | |
1125 | * the nearest non-empty zone in case of random I/O. | |
1126 | */ | |
1127 | for (z1 = zb + 1, z2 = zb - 1; z1 < zl || z2 >= zf; z1++, z2--) { | |
b7694961 | 1128 | if (z1 < zl && z1->cond != ZBD_ZONE_COND_OFFLINE) { |
bfbdd35b | 1129 | pthread_mutex_lock(&z1->mutex); |
ee3696bd | 1130 | if (z1->start + min_bs <= z1->wp) |
bfbdd35b BVA |
1131 | return z1; |
1132 | pthread_mutex_unlock(&z1->mutex); | |
1133 | } else if (!td_random(td)) { | |
1134 | break; | |
1135 | } | |
1136 | if (td_random(td) && z2 >= zf && | |
b7694961 | 1137 | z2->cond != ZBD_ZONE_COND_OFFLINE) { |
bfbdd35b | 1138 | pthread_mutex_lock(&z2->mutex); |
ee3696bd | 1139 | if (z2->start + min_bs <= z2->wp) |
bfbdd35b BVA |
1140 | return z2; |
1141 | pthread_mutex_unlock(&z2->mutex); | |
1142 | } | |
1143 | } | |
1144 | dprint(FD_ZBD, "%s: adjusting random read offset failed\n", | |
1145 | f->file_name); | |
1146 | return NULL; | |
1147 | } | |
1148 | ||
bfbdd35b | 1149 | /** |
d9ed3e63 | 1150 | * zbd_queue_io - update the write pointer of a sequential zone |
bfbdd35b | 1151 | * @io_u: I/O unit |
d9ed3e63 DLM |
1152 | * @success: Whether or not the I/O unit has been queued successfully |
1153 | * @q: queueing status (busy, completed or queued). | |
bfbdd35b | 1154 | * |
d9ed3e63 DLM |
1155 | * For write and trim operations, update the write pointer of the I/O unit |
1156 | * target zone. | |
bfbdd35b | 1157 | */ |
d9ed3e63 | 1158 | static void zbd_queue_io(struct io_u *io_u, int q, bool success) |
bfbdd35b | 1159 | { |
d9ed3e63 DLM |
1160 | const struct fio_file *f = io_u->file; |
1161 | struct zoned_block_device_info *zbd_info = f->zbd_info; | |
bfbdd35b BVA |
1162 | struct fio_zone_info *z; |
1163 | uint32_t zone_idx; | |
d9ed3e63 | 1164 | uint64_t zone_end; |
bfbdd35b | 1165 | |
bfbdd35b BVA |
1166 | if (!zbd_info) |
1167 | return; | |
1168 | ||
d9ed3e63 | 1169 | zone_idx = zbd_zone_idx(f, io_u->offset); |
bfbdd35b | 1170 | assert(zone_idx < zbd_info->nr_zones); |
d9ed3e63 DLM |
1171 | z = &zbd_info->zone_info[zone_idx]; |
1172 | ||
b7694961 | 1173 | if (!zbd_zone_swr(z)) |
bfbdd35b | 1174 | return; |
d9ed3e63 | 1175 | |
bfbdd35b BVA |
1176 | if (!success) |
1177 | goto unlock; | |
d9ed3e63 DLM |
1178 | |
1179 | dprint(FD_ZBD, | |
1180 | "%s: queued I/O (%lld, %llu) for zone %u\n", | |
1181 | f->file_name, io_u->offset, io_u->buflen, zone_idx); | |
1182 | ||
bfbdd35b BVA |
1183 | switch (io_u->ddir) { |
1184 | case DDIR_WRITE: | |
d9ed3e63 DLM |
1185 | zone_end = min((uint64_t)(io_u->offset + io_u->buflen), |
1186 | (z + 1)->start); | |
a7c2b6fc BVA |
1187 | pthread_mutex_lock(&zbd_info->mutex); |
1188 | /* | |
1189 | * z->wp > zone_end means that one or more I/O errors | |
1190 | * have occurred. | |
1191 | */ | |
1192 | if (z->wp <= zone_end) | |
1193 | zbd_info->sectors_with_data += zone_end - z->wp; | |
1194 | pthread_mutex_unlock(&zbd_info->mutex); | |
bfbdd35b BVA |
1195 | z->wp = zone_end; |
1196 | break; | |
1197 | case DDIR_TRIM: | |
1198 | assert(z->wp == z->start); | |
1199 | break; | |
1200 | default: | |
1201 | break; | |
1202 | } | |
d9ed3e63 | 1203 | |
bfbdd35b | 1204 | unlock: |
d9ed3e63 DLM |
1205 | if (!success || q != FIO_Q_QUEUED) { |
1206 | /* BUSY or COMPLETED: unlock the zone */ | |
1207 | pthread_mutex_unlock(&z->mutex); | |
1208 | io_u->zbd_put_io = NULL; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | /** | |
1213 | * zbd_put_io - Unlock an I/O unit target zone lock | |
1214 | * @io_u: I/O unit | |
1215 | */ | |
1216 | static void zbd_put_io(const struct io_u *io_u) | |
1217 | { | |
1218 | const struct fio_file *f = io_u->file; | |
1219 | struct zoned_block_device_info *zbd_info = f->zbd_info; | |
1220 | struct fio_zone_info *z; | |
1221 | uint32_t zone_idx; | |
1222 | ||
1223 | if (!zbd_info) | |
1224 | return; | |
615555bb | 1225 | |
d9ed3e63 DLM |
1226 | zone_idx = zbd_zone_idx(f, io_u->offset); |
1227 | assert(zone_idx < zbd_info->nr_zones); | |
1228 | z = &zbd_info->zone_info[zone_idx]; | |
1229 | ||
b7694961 | 1230 | if (!zbd_zone_swr(z)) |
d9ed3e63 DLM |
1231 | return; |
1232 | ||
1233 | dprint(FD_ZBD, | |
1234 | "%s: terminate I/O (%lld, %llu) for zone %u\n", | |
1235 | f->file_name, io_u->offset, io_u->buflen, zone_idx); | |
1236 | ||
1237 | assert(pthread_mutex_unlock(&z->mutex) == 0); | |
1238 | zbd_check_swd(f); | |
bfbdd35b BVA |
1239 | } |
1240 | ||
9d87c646 DLM |
1241 | /* |
1242 | * Windows and MacOS do not define this. | |
1243 | */ | |
1244 | #ifndef EREMOTEIO | |
1245 | #define EREMOTEIO 121 /* POSIX value */ | |
1246 | #endif | |
1247 | ||
bfbdd35b BVA |
1248 | bool zbd_unaligned_write(int error_code) |
1249 | { | |
1250 | switch (error_code) { | |
1251 | case EIO: | |
1252 | case EREMOTEIO: | |
1253 | return true; | |
1254 | } | |
1255 | return false; | |
1256 | } | |
1257 | ||
4d37720a DLM |
1258 | /** |
1259 | * setup_zbd_zone_mode - handle zoneskip as necessary for ZBD drives | |
1260 | * @td: FIO thread data. | |
1261 | * @io_u: FIO I/O unit. | |
1262 | * | |
1263 | * For sequential workloads, change the file offset to skip zoneskip bytes when | |
1264 | * no more IO can be performed in the current zone. | |
1265 | * - For read workloads, zoneskip is applied when the io has reached the end of | |
1266 | * the zone or the zone write position (when td->o.read_beyond_wp is false). | |
1267 | * - For write workloads, zoneskip is applied when the zone is full. | |
1268 | * This applies only to read and write operations. | |
1269 | */ | |
1270 | void setup_zbd_zone_mode(struct thread_data *td, struct io_u *io_u) | |
1271 | { | |
1272 | struct fio_file *f = io_u->file; | |
1273 | enum fio_ddir ddir = io_u->ddir; | |
1274 | struct fio_zone_info *z; | |
1275 | uint32_t zone_idx; | |
1276 | ||
1277 | assert(td->o.zone_mode == ZONE_MODE_ZBD); | |
1278 | assert(td->o.zone_size); | |
1279 | ||
1280 | /* | |
1281 | * zone_skip is valid only for sequential workloads. | |
1282 | */ | |
1283 | if (td_random(td) || !td->o.zone_skip) | |
1284 | return; | |
1285 | ||
1286 | /* | |
1287 | * It is time to switch to a new zone if: | |
1288 | * - zone_bytes == zone_size bytes have already been accessed | |
1289 | * - The last position reached the end of the current zone. | |
1290 | * - For reads with td->o.read_beyond_wp == false, the last position | |
1291 | * reached the zone write pointer. | |
1292 | */ | |
1293 | zone_idx = zbd_zone_idx(f, f->last_pos[ddir]); | |
1294 | z = &f->zbd_info->zone_info[zone_idx]; | |
1295 | ||
1296 | if (td->zone_bytes >= td->o.zone_size || | |
1297 | f->last_pos[ddir] >= (z+1)->start || | |
1298 | (ddir == DDIR_READ && | |
1299 | (!td->o.read_beyond_wp) && f->last_pos[ddir] >= z->wp)) { | |
1300 | /* | |
1301 | * Skip zones. | |
1302 | */ | |
1303 | td->zone_bytes = 0; | |
1304 | f->file_offset += td->o.zone_size + td->o.zone_skip; | |
1305 | ||
1306 | /* | |
1307 | * Wrap from the beginning, if we exceed the file size | |
1308 | */ | |
1309 | if (f->file_offset >= f->real_file_size) | |
1310 | f->file_offset = get_start_offset(td, f); | |
1311 | ||
1312 | f->last_pos[ddir] = f->file_offset; | |
1313 | td->io_skip_bytes += td->o.zone_skip; | |
1314 | } | |
1315 | } | |
1316 | ||
bfbdd35b BVA |
1317 | /** |
1318 | * zbd_adjust_block - adjust the offset and length as necessary for ZBD drives | |
1319 | * @td: FIO thread data. | |
1320 | * @io_u: FIO I/O unit. | |
1321 | * | |
1322 | * Locking strategy: returns with z->mutex locked if and only if z refers | |
1323 | * to a sequential zone and if io_u_accept is returned. z is the zone that | |
1324 | * corresponds to io_u->offset at the end of this function. | |
1325 | */ | |
1326 | enum io_u_action zbd_adjust_block(struct thread_data *td, struct io_u *io_u) | |
1327 | { | |
b7694961 | 1328 | struct fio_file *f = io_u->file; |
bfbdd35b | 1329 | uint32_t zone_idx_b; |
de65f7b7 | 1330 | struct fio_zone_info *zb, *zl, *orig_zb; |
bfbdd35b BVA |
1331 | uint32_t orig_len = io_u->buflen; |
1332 | uint32_t min_bs = td->o.min_bs[io_u->ddir]; | |
1333 | uint64_t new_len; | |
1334 | int64_t range; | |
1335 | ||
1336 | if (!f->zbd_info) | |
1337 | return io_u_accept; | |
1338 | ||
adc6adcb | 1339 | assert(min_bs); |
bfbdd35b BVA |
1340 | assert(is_valid_offset(f, io_u->offset)); |
1341 | assert(io_u->buflen); | |
1342 | zone_idx_b = zbd_zone_idx(f, io_u->offset); | |
1343 | zb = &f->zbd_info->zone_info[zone_idx_b]; | |
de65f7b7 | 1344 | orig_zb = zb; |
bfbdd35b BVA |
1345 | |
1346 | /* Accept the I/O offset for conventional zones. */ | |
b7694961 | 1347 | if (!zbd_zone_swr(zb)) |
bfbdd35b BVA |
1348 | return io_u_accept; |
1349 | ||
1350 | /* | |
1351 | * Accept the I/O offset for reads if reading beyond the write pointer | |
1352 | * is enabled. | |
1353 | */ | |
b7694961 | 1354 | if (zb->cond != ZBD_ZONE_COND_OFFLINE && |
bfbdd35b BVA |
1355 | io_u->ddir == DDIR_READ && td->o.read_beyond_wp) |
1356 | return io_u_accept; | |
1357 | ||
615555bb BVA |
1358 | zbd_check_swd(f); |
1359 | ||
b27aef6a | 1360 | zone_lock(td, zb); |
6f0c6085 | 1361 | |
bfbdd35b BVA |
1362 | switch (io_u->ddir) { |
1363 | case DDIR_READ: | |
1364 | if (td->runstate == TD_VERIFYING) { | |
59b07544 | 1365 | zb = zbd_replay_write_order(td, io_u, zb); |
bfbdd35b BVA |
1366 | goto accept; |
1367 | } | |
1368 | /* | |
de65f7b7 DLM |
1369 | * Check that there is enough written data in the zone to do an |
1370 | * I/O of at least min_bs B. If there isn't, find a new zone for | |
1371 | * the I/O. | |
bfbdd35b | 1372 | */ |
b7694961 | 1373 | range = zb->cond != ZBD_ZONE_COND_OFFLINE ? |
ee3696bd | 1374 | zb->wp - zb->start : 0; |
de65f7b7 | 1375 | if (range < min_bs || |
ee3696bd | 1376 | ((!td_random(td)) && (io_u->offset + min_bs > zb->wp))) { |
bfbdd35b BVA |
1377 | pthread_mutex_unlock(&zb->mutex); |
1378 | zl = &f->zbd_info->zone_info[zbd_zone_idx(f, | |
1379 | f->file_offset + f->io_size)]; | |
1380 | zb = zbd_find_zone(td, io_u, zb, zl); | |
1381 | if (!zb) { | |
1382 | dprint(FD_ZBD, | |
1383 | "%s: zbd_find_zone(%lld, %llu) failed\n", | |
1384 | f->file_name, io_u->offset, | |
1385 | io_u->buflen); | |
1386 | goto eof; | |
1387 | } | |
de65f7b7 DLM |
1388 | /* |
1389 | * zbd_find_zone() returned a zone with a range of at | |
1390 | * least min_bs. | |
1391 | */ | |
ee3696bd | 1392 | range = zb->wp - zb->start; |
de65f7b7 DLM |
1393 | assert(range >= min_bs); |
1394 | ||
1395 | if (!td_random(td)) | |
ee3696bd | 1396 | io_u->offset = zb->start; |
bfbdd35b | 1397 | } |
de65f7b7 DLM |
1398 | /* |
1399 | * Make sure the I/O is within the zone valid data range while | |
1400 | * maximizing the I/O size and preserving randomness. | |
1401 | */ | |
1402 | if (range <= io_u->buflen) | |
ee3696bd | 1403 | io_u->offset = zb->start; |
de65f7b7 | 1404 | else if (td_random(td)) |
ee3696bd DLM |
1405 | io_u->offset = zb->start + |
1406 | ((io_u->offset - orig_zb->start) % | |
de65f7b7 DLM |
1407 | (range - io_u->buflen)) / min_bs * min_bs; |
1408 | /* | |
1409 | * Make sure the I/O does not cross over the zone wp position. | |
1410 | */ | |
1411 | new_len = min((unsigned long long)io_u->buflen, | |
ee3696bd | 1412 | (unsigned long long)(zb->wp - io_u->offset)); |
de65f7b7 DLM |
1413 | new_len = new_len / min_bs * min_bs; |
1414 | if (new_len < io_u->buflen) { | |
1415 | io_u->buflen = new_len; | |
1416 | dprint(FD_IO, "Changed length from %u into %llu\n", | |
1417 | orig_len, io_u->buflen); | |
bfbdd35b | 1418 | } |
ee3696bd DLM |
1419 | assert(zb->start <= io_u->offset); |
1420 | assert(io_u->offset + io_u->buflen <= zb->wp); | |
bfbdd35b BVA |
1421 | goto accept; |
1422 | case DDIR_WRITE: | |
ee3696bd | 1423 | if (io_u->buflen > f->zbd_info->zone_size) |
bfbdd35b | 1424 | goto eof; |
59b07544 BVA |
1425 | if (!zbd_open_zone(td, io_u, zone_idx_b)) { |
1426 | pthread_mutex_unlock(&zb->mutex); | |
1427 | zb = zbd_convert_to_open_zone(td, io_u); | |
1428 | if (!zb) | |
1429 | goto eof; | |
1430 | zone_idx_b = zb - f->zbd_info->zone_info; | |
1431 | } | |
a7c2b6fc BVA |
1432 | /* Check whether the zone reset threshold has been exceeded */ |
1433 | if (td->o.zrf.u.f) { | |
ee3696bd | 1434 | if (f->zbd_info->sectors_with_data >= |
a7c2b6fc BVA |
1435 | f->io_size * td->o.zrt.u.f && |
1436 | zbd_dec_and_reset_write_cnt(td, f)) { | |
1437 | zb->reset_zone = 1; | |
1438 | } | |
1439 | } | |
bfbdd35b BVA |
1440 | /* Reset the zone pointer if necessary */ |
1441 | if (zb->reset_zone || zbd_zone_full(f, zb, min_bs)) { | |
1442 | assert(td->o.verify == VERIFY_NONE); | |
1443 | /* | |
1444 | * Since previous write requests may have been submitted | |
1445 | * asynchronously and since we will submit the zone | |
1446 | * reset synchronously, wait until previously submitted | |
1447 | * write requests have completed before issuing a | |
1448 | * zone reset. | |
1449 | */ | |
1450 | io_u_quiesce(td); | |
1451 | zb->reset_zone = 0; | |
1452 | if (zbd_reset_zone(td, f, zb) < 0) | |
1453 | goto eof; | |
1454 | } | |
1455 | /* Make writes occur at the write pointer */ | |
1456 | assert(!zbd_zone_full(f, zb, min_bs)); | |
ee3696bd | 1457 | io_u->offset = zb->wp; |
bfbdd35b BVA |
1458 | if (!is_valid_offset(f, io_u->offset)) { |
1459 | dprint(FD_ZBD, "Dropped request with offset %llu\n", | |
1460 | io_u->offset); | |
1461 | goto eof; | |
1462 | } | |
1463 | /* | |
1464 | * Make sure that the buflen is a multiple of the minimal | |
1465 | * block size. Give up if shrinking would make the request too | |
1466 | * small. | |
1467 | */ | |
1468 | new_len = min((unsigned long long)io_u->buflen, | |
ee3696bd | 1469 | (zb + 1)->start - io_u->offset); |
bfbdd35b BVA |
1470 | new_len = new_len / min_bs * min_bs; |
1471 | if (new_len == io_u->buflen) | |
1472 | goto accept; | |
1473 | if (new_len >= min_bs) { | |
1474 | io_u->buflen = new_len; | |
1475 | dprint(FD_IO, "Changed length from %u into %llu\n", | |
1476 | orig_len, io_u->buflen); | |
1477 | goto accept; | |
1478 | } | |
1479 | log_err("Zone remainder %lld smaller than minimum block size %d\n", | |
ee3696bd | 1480 | ((zb + 1)->start - io_u->offset), |
bfbdd35b BVA |
1481 | min_bs); |
1482 | goto eof; | |
1483 | case DDIR_TRIM: | |
1484 | /* fall-through */ | |
1485 | case DDIR_SYNC: | |
1486 | case DDIR_DATASYNC: | |
1487 | case DDIR_SYNC_FILE_RANGE: | |
1488 | case DDIR_WAIT: | |
1489 | case DDIR_LAST: | |
1490 | case DDIR_INVAL: | |
1491 | goto accept; | |
1492 | } | |
1493 | ||
1494 | assert(false); | |
1495 | ||
1496 | accept: | |
1497 | assert(zb); | |
b7694961 | 1498 | assert(zb->cond != ZBD_ZONE_COND_OFFLINE); |
d9ed3e63 DLM |
1499 | assert(!io_u->zbd_queue_io); |
1500 | assert(!io_u->zbd_put_io); | |
1501 | io_u->zbd_queue_io = zbd_queue_io; | |
1502 | io_u->zbd_put_io = zbd_put_io; | |
bfbdd35b BVA |
1503 | return io_u_accept; |
1504 | ||
1505 | eof: | |
1506 | if (zb) | |
1507 | pthread_mutex_unlock(&zb->mutex); | |
1508 | return io_u_eof; | |
1509 | } | |
fd5d733f BVA |
1510 | |
1511 | /* Return a string with ZBD statistics */ | |
1512 | char *zbd_write_status(const struct thread_stat *ts) | |
1513 | { | |
1514 | char *res; | |
1515 | ||
a0c84dd4 | 1516 | if (asprintf(&res, "; %llu zone resets", (unsigned long long) ts->nr_zone_resets) < 0) |
fd5d733f BVA |
1517 | return NULL; |
1518 | return res; | |
1519 | } |