Commit | Line | Data |
---|---|---|
8a4c41dd | 1 | #include <inttypes.h> |
9f8f2064 JA |
2 | #include <stdio.h> |
3 | #include <string.h> | |
9f8f2064 JA |
4 | #include <sys/types.h> |
5 | #include <sys/stat.h> | |
036a1599 | 6 | #include <sys/sysmacros.h> |
9f8f2064 JA |
7 | #include <dirent.h> |
8 | #include <libgen.h> | |
4f37732a BVA |
9 | #ifdef CONFIG_VALGRIND_DEV |
10 | #include <valgrind/drd.h> | |
11 | #else | |
12 | #define DRD_IGNORE_VAR(x) do { } while (0) | |
13 | #endif | |
9f8f2064 JA |
14 | |
15 | #include "fio.h" | |
c97bd0fa | 16 | #include "smalloc.h" |
7c9b1bce | 17 | #include "diskutil.h" |
a39fb9ea | 18 | #include "helper_thread.h" |
9f8f2064 JA |
19 | |
20 | static int last_majdev, last_mindev; | |
c97bd0fa | 21 | static struct disk_util *last_du; |
9f8f2064 | 22 | |
971caeb1 | 23 | static struct fio_sem *disk_util_sem; |
9ec7779f | 24 | |
2db4ecca JA |
25 | static struct disk_util *__init_per_file_disk_util(struct thread_data *td, |
26 | int majdev, int mindev, char *path); | |
27 | ||
c97bd0fa JA |
28 | static void disk_util_free(struct disk_util *du) |
29 | { | |
30 | if (du == last_du) | |
31 | last_du = NULL; | |
32 | ||
b8d541d5 JA |
33 | while (!flist_empty(&du->slaves)) { |
34 | struct disk_util *slave; | |
35 | ||
9342d5f8 | 36 | slave = flist_first_entry(&du->slaves, struct disk_util, slavelist); |
b8d541d5 JA |
37 | flist_del(&slave->slavelist); |
38 | slave->users--; | |
39 | } | |
93bcfd20 | 40 | |
971caeb1 | 41 | fio_sem_remove(du->lock); |
2a20eebc | 42 | free(du->sysfs_root); |
c97bd0fa JA |
43 | sfree(du); |
44 | } | |
45 | ||
9f8f2064 JA |
46 | static int get_io_ticks(struct disk_util *du, struct disk_util_stat *dus) |
47 | { | |
9f8f2064 JA |
48 | char line[256]; |
49 | FILE *f; | |
50 | char *p; | |
5ec10eaa | 51 | int ret; |
9f8f2064 | 52 | |
cd991b9e JA |
53 | dprint(FD_DISKUTIL, "open stat file: %s\n", du->path); |
54 | ||
9f8f2064 JA |
55 | f = fopen(du->path, "r"); |
56 | if (!f) | |
57 | return 1; | |
58 | ||
59 | p = fgets(line, sizeof(line), f); | |
60 | if (!p) { | |
61 | fclose(f); | |
62 | return 1; | |
63 | } | |
64 | ||
cd991b9e JA |
65 | dprint(FD_DISKUTIL, "%s: %s", du->path, p); |
66 | ||
e08d9f69 BVA |
67 | ret = sscanf(p, "%"SCNu64" %"SCNu64" %"SCNu64" %"SCNu64" " |
68 | "%"SCNu64" %"SCNu64" %"SCNu64" %"SCNu64" " | |
69 | "%*u %"SCNu64" %"SCNu64"\n", | |
70 | &dus->s.ios[0], &dus->s.merges[0], &dus->s.sectors[0], | |
8a4c41dd | 71 | &dus->s.ticks[0], |
e08d9f69 | 72 | &dus->s.ios[1], &dus->s.merges[1], &dus->s.sectors[1], |
8a4c41dd | 73 | &dus->s.ticks[1], |
e08d9f69 | 74 | &dus->s.io_ticks, &dus->s.time_in_queue); |
9f8f2064 | 75 | fclose(f); |
843b07e1 | 76 | dprint(FD_DISKUTIL, "%s: stat read ok? %d\n", du->path, ret == 10); |
e08d9f69 | 77 | return ret != 10; |
9f8f2064 JA |
78 | } |
79 | ||
5f7bd351 AN |
80 | static uint64_t safe_32bit_diff(uint64_t nval, uint64_t oval) |
81 | { | |
82 | /* Linux kernel prints some of the stat fields as 32-bit integers. It is | |
83 | * possible that the value overflows, but since fio uses unsigned 64-bit | |
84 | * arithmetic in update_io_tick_disk(), it instead results in a huge | |
85 | * bogus value being added to the respective accumulating field. Just | |
86 | * in case Linux starts reporting these metrics as 64-bit values in the | |
87 | * future, check that overflow actually happens around the 32-bit | |
88 | * unsigned boundary; assume overflow only happens once between | |
89 | * successive polls. | |
90 | */ | |
91 | if (oval <= nval || oval >= (1ull << 32)) | |
92 | return nval - oval; | |
93 | else | |
94 | return (1ull << 32) + nval - oval; | |
95 | } | |
96 | ||
9f8f2064 JA |
97 | static void update_io_tick_disk(struct disk_util *du) |
98 | { | |
99 | struct disk_util_stat __dus, *dus, *ldus; | |
8b6a404c | 100 | struct timespec t; |
9f8f2064 | 101 | |
c97bd0fa JA |
102 | if (!du->users) |
103 | return; | |
90b97ac3 JA |
104 | if (get_io_ticks(du, &__dus)) |
105 | return; | |
9f8f2064 JA |
106 | |
107 | dus = &du->dus; | |
108 | ldus = &du->last_dus; | |
109 | ||
a3b4cf7d JA |
110 | dus->s.sectors[0] += (__dus.s.sectors[0] - ldus->s.sectors[0]); |
111 | dus->s.sectors[1] += (__dus.s.sectors[1] - ldus->s.sectors[1]); | |
112 | dus->s.ios[0] += (__dus.s.ios[0] - ldus->s.ios[0]); | |
113 | dus->s.ios[1] += (__dus.s.ios[1] - ldus->s.ios[1]); | |
114 | dus->s.merges[0] += (__dus.s.merges[0] - ldus->s.merges[0]); | |
115 | dus->s.merges[1] += (__dus.s.merges[1] - ldus->s.merges[1]); | |
5f7bd351 AN |
116 | dus->s.ticks[0] += safe_32bit_diff(__dus.s.ticks[0], ldus->s.ticks[0]); |
117 | dus->s.ticks[1] += safe_32bit_diff(__dus.s.ticks[1], ldus->s.ticks[1]); | |
118 | dus->s.io_ticks += safe_32bit_diff(__dus.s.io_ticks, ldus->s.io_ticks); | |
119 | dus->s.time_in_queue += | |
120 | safe_32bit_diff(__dus.s.time_in_queue, ldus->s.time_in_queue); | |
9f8f2064 JA |
121 | |
122 | fio_gettime(&t, NULL); | |
a3b4cf7d | 123 | dus->s.msec += mtime_since(&du->time, &t); |
4b3d7ff7 AN |
124 | du->time = t; |
125 | ldus->s = __dus.s; | |
9f8f2064 JA |
126 | } |
127 | ||
9ec7779f | 128 | int update_io_ticks(void) |
9f8f2064 | 129 | { |
01743ee1 | 130 | struct flist_head *entry; |
9f8f2064 | 131 | struct disk_util *du; |
9ec7779f | 132 | int ret = 0; |
9f8f2064 | 133 | |
cd991b9e JA |
134 | dprint(FD_DISKUTIL, "update io ticks\n"); |
135 | ||
971caeb1 | 136 | fio_sem_down(disk_util_sem); |
9ec7779f | 137 | |
a47591e4 | 138 | if (!helper_should_exit()) { |
9ec7779f JA |
139 | flist_for_each(entry, &disk_list) { |
140 | du = flist_entry(entry, struct disk_util, list); | |
141 | update_io_tick_disk(du); | |
142 | } | |
143 | } else | |
144 | ret = 1; | |
145 | ||
971caeb1 | 146 | fio_sem_up(disk_util_sem); |
9ec7779f | 147 | return ret; |
9f8f2064 JA |
148 | } |
149 | ||
e11c410c | 150 | static struct disk_util *disk_util_exists(int major, int minor) |
9f8f2064 | 151 | { |
01743ee1 | 152 | struct flist_head *entry; |
9f8f2064 JA |
153 | struct disk_util *du; |
154 | ||
971caeb1 | 155 | fio_sem_down(disk_util_sem); |
9ec7779f | 156 | |
01743ee1 JA |
157 | flist_for_each(entry, &disk_list) { |
158 | du = flist_entry(entry, struct disk_util, list); | |
9f8f2064 | 159 | |
9ec7779f | 160 | if (major == du->major && minor == du->minor) { |
971caeb1 | 161 | fio_sem_up(disk_util_sem); |
e11c410c | 162 | return du; |
9ec7779f | 163 | } |
9f8f2064 JA |
164 | } |
165 | ||
971caeb1 | 166 | fio_sem_up(disk_util_sem); |
e11c410c | 167 | return NULL; |
9f8f2064 JA |
168 | } |
169 | ||
67423013 ST |
170 | static int get_device_numbers(char *file_name, int *maj, int *min) |
171 | { | |
172 | struct stat st; | |
173 | int majdev, mindev; | |
174 | char tempname[PATH_MAX], *p; | |
175 | ||
176 | if (!lstat(file_name, &st)) { | |
177 | if (S_ISBLK(st.st_mode)) { | |
178 | majdev = major(st.st_rdev); | |
179 | mindev = minor(st.st_rdev); | |
38297555 ES |
180 | } else if (S_ISCHR(st.st_mode) || |
181 | S_ISFIFO(st.st_mode)) { | |
67423013 | 182 | return -1; |
38297555 | 183 | } else { |
67423013 ST |
184 | majdev = major(st.st_dev); |
185 | mindev = minor(st.st_dev); | |
186 | } | |
187 | } else { | |
188 | /* | |
189 | * must be a file, open "." in that path | |
190 | */ | |
59f94d26 | 191 | snprintf(tempname, FIO_ARRAY_SIZE(tempname), "%s", file_name); |
67423013 ST |
192 | p = dirname(tempname); |
193 | if (stat(p, &st)) { | |
194 | perror("disk util stat"); | |
195 | return -1; | |
196 | } | |
197 | ||
198 | majdev = major(st.st_dev); | |
199 | mindev = minor(st.st_dev); | |
200 | } | |
201 | ||
202 | *min = mindev; | |
203 | *maj = majdev; | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static int read_block_dev_entry(char *path, int *maj, int *min) | |
209 | { | |
210 | char line[256], *p; | |
211 | FILE *f; | |
212 | ||
213 | f = fopen(path, "r"); | |
214 | if (!f) { | |
215 | perror("open path"); | |
216 | return 1; | |
217 | } | |
218 | ||
219 | p = fgets(line, sizeof(line), f); | |
220 | fclose(f); | |
221 | ||
222 | if (!p) | |
223 | return 1; | |
224 | ||
225 | if (sscanf(p, "%u:%u", maj, min) != 2) | |
226 | return 1; | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
67423013 | 231 | static void find_add_disk_slaves(struct thread_data *td, char *path, |
2db4ecca | 232 | struct disk_util *masterdu) |
67423013 ST |
233 | { |
234 | DIR *dirhandle = NULL; | |
235 | struct dirent *dirent = NULL; | |
236 | char slavesdir[PATH_MAX], temppath[PATH_MAX], slavepath[PATH_MAX]; | |
237 | struct disk_util *slavedu = NULL; | |
238 | int majdev, mindev; | |
239 | ssize_t linklen; | |
240 | ||
2db4ecca | 241 | sprintf(slavesdir, "%s/%s", path, "slaves"); |
67423013 ST |
242 | dirhandle = opendir(slavesdir); |
243 | if (!dirhandle) | |
244 | return; | |
245 | ||
246 | while ((dirent = readdir(dirhandle)) != NULL) { | |
2db4ecca JA |
247 | if (!strcmp(dirent->d_name, ".") || |
248 | !strcmp(dirent->d_name, "..")) | |
67423013 ST |
249 | continue; |
250 | ||
b4d2bc70 BVA |
251 | nowarn_snprintf(temppath, sizeof(temppath), "%s/%s", slavesdir, |
252 | dirent->d_name); | |
67423013 ST |
253 | /* Can we always assume that the slaves device entries |
254 | * are links to the real directories for the slave | |
255 | * devices? | |
256 | */ | |
976406b8 | 257 | linklen = readlink(temppath, slavepath, PATH_MAX - 1); |
81286ecd | 258 | if (linklen < 0) { |
67423013 | 259 | perror("readlink() for slave device."); |
f0cc675f | 260 | closedir(dirhandle); |
67423013 ST |
261 | return; |
262 | } | |
2db4ecca | 263 | slavepath[linklen] = '\0'; |
67423013 | 264 | |
b4d2bc70 BVA |
265 | nowarn_snprintf(temppath, sizeof(temppath), "%s/%s/dev", |
266 | slavesdir, slavepath); | |
75d5519d | 267 | if (access(temppath, F_OK) != 0) |
b4d2bc70 BVA |
268 | nowarn_snprintf(temppath, sizeof(temppath), |
269 | "%s/%s/device/dev", slavesdir, | |
270 | slavepath); | |
67423013 | 271 | if (read_block_dev_entry(temppath, &majdev, &mindev)) { |
81286ecd | 272 | perror("Error getting slave device numbers"); |
f0cc675f | 273 | closedir(dirhandle); |
67423013 ST |
274 | return; |
275 | } | |
276 | ||
b06de82e AB |
277 | /* |
278 | * See if this maj,min already exists | |
279 | */ | |
280 | slavedu = disk_util_exists(majdev, mindev); | |
281 | if (slavedu) | |
282 | continue; | |
283 | ||
b4d2bc70 BVA |
284 | nowarn_snprintf(temppath, sizeof(temppath), "%s/%s", slavesdir, |
285 | slavepath); | |
67423013 ST |
286 | __init_per_file_disk_util(td, majdev, mindev, temppath); |
287 | slavedu = disk_util_exists(majdev, mindev); | |
288 | ||
289 | /* Should probably use an assert here. slavedu should | |
290 | * always be present at this point. */ | |
b8d541d5 JA |
291 | if (slavedu) { |
292 | slavedu->users++; | |
67423013 | 293 | flist_add_tail(&slavedu->slavelist, &masterdu->slaves); |
b8d541d5 | 294 | } |
67423013 ST |
295 | } |
296 | ||
297 | closedir(dirhandle); | |
67423013 ST |
298 | } |
299 | ||
b8fefc2b | 300 | static struct disk_util *disk_util_add(struct thread_data *td, int majdev, |
c97bd0fa | 301 | int mindev, char *path) |
9f8f2064 JA |
302 | { |
303 | struct disk_util *du, *__du; | |
01743ee1 | 304 | struct flist_head *entry; |
4b919f77 | 305 | int l; |
9f8f2064 | 306 | |
cd991b9e JA |
307 | dprint(FD_DISKUTIL, "add maj/min %d/%d: %s\n", majdev, mindev, path); |
308 | ||
c97bd0fa | 309 | du = smalloc(sizeof(*du)); |
81b3c86f | 310 | if (!du) |
fba5c5ff | 311 | return NULL; |
fba5c5ff | 312 | |
4f37732a | 313 | DRD_IGNORE_VAR(du->users); |
9f8f2064 | 314 | memset(du, 0, sizeof(*du)); |
01743ee1 | 315 | INIT_FLIST_HEAD(&du->list); |
4b919f77 KR |
316 | l = snprintf(du->path, sizeof(du->path), "%s/stat", path); |
317 | if (l < 0 || l >= sizeof(du->path)) { | |
318 | log_err("constructed path \"%.100s[...]/stat\" larger than buffer (%zu bytes)\n", | |
319 | path, sizeof(du->path) - 1); | |
320 | sfree(du); | |
321 | return NULL; | |
322 | } | |
59f94d26 | 323 | snprintf((char *) du->dus.name, FIO_ARRAY_SIZE(du->dus.name), "%s", |
36833fb0 | 324 | basename(path)); |
2a20eebc | 325 | du->sysfs_root = strdup(path); |
9f8f2064 JA |
326 | du->major = majdev; |
327 | du->minor = mindev; | |
67423013 ST |
328 | INIT_FLIST_HEAD(&du->slavelist); |
329 | INIT_FLIST_HEAD(&du->slaves); | |
971caeb1 | 330 | du->lock = fio_sem_init(FIO_SEM_UNLOCKED); |
c97bd0fa | 331 | du->users = 0; |
9f8f2064 | 332 | |
971caeb1 | 333 | fio_sem_down(disk_util_sem); |
9ec7779f | 334 | |
01743ee1 JA |
335 | flist_for_each(entry, &disk_list) { |
336 | __du = flist_entry(entry, struct disk_util, list); | |
9f8f2064 | 337 | |
d09a64a0 | 338 | dprint(FD_DISKUTIL, "found %s in list\n", __du->dus.name); |
cd991b9e | 339 | |
d09a64a0 | 340 | if (!strcmp((char *) du->dus.name, (char *) __du->dus.name)) { |
c97bd0fa | 341 | disk_util_free(du); |
971caeb1 | 342 | fio_sem_up(disk_util_sem); |
c97bd0fa | 343 | return __du; |
9f8f2064 JA |
344 | } |
345 | } | |
346 | ||
d09a64a0 | 347 | dprint(FD_DISKUTIL, "add %s to list\n", du->dus.name); |
cd991b9e | 348 | |
9f8f2064 JA |
349 | fio_gettime(&du->time, NULL); |
350 | get_io_ticks(du, &du->last_dus); | |
351 | ||
01743ee1 | 352 | flist_add_tail(&du->list, &disk_list); |
971caeb1 | 353 | fio_sem_up(disk_util_sem); |
9ec7779f | 354 | |
67423013 | 355 | find_add_disk_slaves(td, path, du); |
c97bd0fa | 356 | return du; |
9f8f2064 JA |
357 | } |
358 | ||
359 | static int check_dev_match(int majdev, int mindev, char *path) | |
360 | { | |
361 | int major, minor; | |
9f8f2064 | 362 | |
67423013 | 363 | if (read_block_dev_entry(path, &major, &minor)) |
9f8f2064 | 364 | return 1; |
9f8f2064 | 365 | |
c97bd0fa | 366 | if (majdev == major && mindev == minor) |
9f8f2064 | 367 | return 0; |
9f8f2064 | 368 | |
9f8f2064 JA |
369 | return 1; |
370 | } | |
371 | ||
ac0be2ac | 372 | static int find_block_dir(int majdev, int mindev, char *path, int link_ok) |
9f8f2064 JA |
373 | { |
374 | struct dirent *dir; | |
375 | struct stat st; | |
376 | int found = 0; | |
377 | DIR *D; | |
378 | ||
379 | D = opendir(path); | |
380 | if (!D) | |
381 | return 0; | |
382 | ||
383 | while ((dir = readdir(D)) != NULL) { | |
5ccdfd74 | 384 | char full_path[257]; |
9f8f2064 JA |
385 | |
386 | if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) | |
387 | continue; | |
388 | ||
22497370 | 389 | sprintf(full_path, "%s/%s", path, dir->d_name); |
9f8f2064 JA |
390 | |
391 | if (!strcmp(dir->d_name, "dev")) { | |
392 | if (!check_dev_match(majdev, mindev, full_path)) { | |
393 | found = 1; | |
394 | break; | |
395 | } | |
396 | } | |
397 | ||
ac0be2ac JA |
398 | if (link_ok) { |
399 | if (stat(full_path, &st) == -1) { | |
400 | perror("stat"); | |
401 | break; | |
402 | } | |
403 | } else { | |
404 | if (lstat(full_path, &st) == -1) { | |
405 | perror("stat"); | |
406 | break; | |
407 | } | |
9f8f2064 JA |
408 | } |
409 | ||
410 | if (!S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode)) | |
411 | continue; | |
412 | ||
ac0be2ac | 413 | found = find_block_dir(majdev, mindev, full_path, 0); |
9f8f2064 JA |
414 | if (found) { |
415 | strcpy(path, full_path); | |
416 | break; | |
417 | } | |
418 | } | |
419 | ||
420 | closedir(D); | |
421 | return found; | |
422 | } | |
423 | ||
c97bd0fa JA |
424 | static struct disk_util *__init_per_file_disk_util(struct thread_data *td, |
425 | int majdev, int mindev, | |
426 | char *path) | |
9f8f2064 JA |
427 | { |
428 | struct stat st; | |
67423013 | 429 | char tmp[PATH_MAX]; |
9f8f2064 JA |
430 | char *p; |
431 | ||
67423013 ST |
432 | /* |
433 | * If there's a ../queue/ directory there, we are inside a partition. | |
434 | * Check if that is the case and jump back. For loop/md/dm etc we | |
435 | * are already in the right spot. | |
436 | */ | |
437 | sprintf(tmp, "%s/../queue", path); | |
438 | if (!stat(tmp, &st)) { | |
439 | p = dirname(path); | |
440 | sprintf(tmp, "%s/queue", p); | |
441 | if (stat(tmp, &st)) { | |
442 | log_err("unknown sysfs layout\n"); | |
c97bd0fa | 443 | return NULL; |
9f8f2064 | 444 | } |
59f94d26 | 445 | snprintf(tmp, FIO_ARRAY_SIZE(tmp), "%s", p); |
67423013 | 446 | sprintf(path, "%s", tmp); |
9f8f2064 JA |
447 | } |
448 | ||
c97bd0fa | 449 | return disk_util_add(td, majdev, mindev, path); |
67423013 ST |
450 | } |
451 | ||
c97bd0fa JA |
452 | static struct disk_util *init_per_file_disk_util(struct thread_data *td, |
453 | char *filename) | |
67423013 ST |
454 | { |
455 | ||
456 | char foo[PATH_MAX]; | |
457 | struct disk_util *du; | |
458 | int mindev, majdev; | |
459 | ||
c97bd0fa JA |
460 | if (get_device_numbers(filename, &majdev, &mindev)) |
461 | return NULL; | |
67423013 ST |
462 | |
463 | dprint(FD_DISKUTIL, "%s belongs to maj/min %d/%d\n", filename, majdev, | |
464 | mindev); | |
cd991b9e | 465 | |
e11c410c | 466 | du = disk_util_exists(majdev, mindev); |
bd4d9bdc | 467 | if (du) |
c97bd0fa | 468 | return du; |
9f8f2064 JA |
469 | |
470 | /* | |
471 | * for an fs without a device, we will repeatedly stat through | |
472 | * sysfs which can take oodles of time for thousands of files. so | |
473 | * cache the last lookup and compare with that before going through | |
474 | * everything again. | |
475 | */ | |
476 | if (mindev == last_mindev && majdev == last_majdev) | |
c97bd0fa | 477 | return last_du; |
9f8f2064 JA |
478 | |
479 | last_mindev = mindev; | |
480 | last_majdev = majdev; | |
5ec10eaa | 481 | |
9f8f2064 | 482 | sprintf(foo, "/sys/block"); |
ac0be2ac | 483 | if (!find_block_dir(majdev, mindev, foo, 1)) |
c97bd0fa | 484 | return NULL; |
9f8f2064 | 485 | |
c97bd0fa | 486 | return __init_per_file_disk_util(td, majdev, mindev, foo); |
67423013 | 487 | } |
9f8f2064 | 488 | |
c97bd0fa JA |
489 | static struct disk_util *__init_disk_util(struct thread_data *td, |
490 | struct fio_file *f) | |
67423013 ST |
491 | { |
492 | return init_per_file_disk_util(td, f->file_name); | |
9f8f2064 JA |
493 | } |
494 | ||
495 | void init_disk_util(struct thread_data *td) | |
496 | { | |
497 | struct fio_file *f; | |
498 | unsigned int i; | |
499 | ||
500 | if (!td->o.do_disk_util || | |
9b87f09b | 501 | td_ioengine_flagged(td, FIO_DISKLESSIO | FIO_NODISKUTIL)) |
9f8f2064 JA |
502 | return; |
503 | ||
504 | for_each_file(td, f, i) | |
c97bd0fa | 505 | f->du = __init_disk_util(td, f); |
9f8f2064 JA |
506 | } |
507 | ||
27357187 | 508 | void disk_util_prune_entries(void) |
d09a64a0 | 509 | { |
971caeb1 | 510 | fio_sem_down(disk_util_sem); |
9ec7779f | 511 | |
d09a64a0 | 512 | while (!flist_empty(&disk_list)) { |
27357187 JA |
513 | struct disk_util *du; |
514 | ||
9342d5f8 | 515 | du = flist_first_entry(&disk_list, struct disk_util, list); |
d09a64a0 JA |
516 | flist_del(&du->list); |
517 | disk_util_free(du); | |
518 | } | |
043b74b9 | 519 | |
d09a64a0 | 520 | last_majdev = last_mindev = -1; |
971caeb1 BVA |
521 | fio_sem_up(disk_util_sem); |
522 | fio_sem_remove(disk_util_sem); | |
d09a64a0 JA |
523 | } |
524 | ||
9ec7779f JA |
525 | void setup_disk_util(void) |
526 | { | |
971caeb1 | 527 | disk_util_sem = fio_sem_init(FIO_SEM_UNLOCKED); |
9f8f2064 | 528 | } |