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Commit | Line | Data |
---|---|---|
e86c9dd6 NB |
1 | /* |
2 | * sysfs - extract md related information from sysfs. Part of: | |
3 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
4 | * | |
e736b623 | 5 | * Copyright (C) 2006-2009 Neil Brown <neilb@suse.de> |
e86c9dd6 NB |
6 | * |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | * Author: Neil Brown | |
23 | * Email: <neilb@suse.de> | |
24 | */ | |
25 | ||
26 | #include "mdadm.h" | |
27 | #include <dirent.h> | |
1770662b | 28 | #include <ctype.h> |
e86c9dd6 NB |
29 | |
30 | int load_sys(char *path, char *buf) | |
31 | { | |
32 | int fd = open(path, O_RDONLY); | |
33 | int n; | |
34 | if (fd < 0) | |
35 | return -1; | |
36 | n = read(fd, buf, 1024); | |
37 | close(fd); | |
2f6079dc | 38 | if (n <0 || n >= 1024) |
e86c9dd6 NB |
39 | return -1; |
40 | buf[n] = 0; | |
8dfb8619 | 41 | if (n && buf[n-1] == '\n') |
e86c9dd6 NB |
42 | buf[n-1] = 0; |
43 | return 0; | |
44 | } | |
45 | ||
7e0f6979 | 46 | void sysfs_free(struct mdinfo *sra) |
8382f19b | 47 | { |
7e0f6979 NB |
48 | while (sra) { |
49 | struct mdinfo *sra2 = sra->next; | |
50 | while (sra->devs) { | |
51 | struct mdinfo *d = sra->devs; | |
52 | sra->devs = d->next; | |
53 | free(d); | |
54 | } | |
55 | free(sra); | |
56 | sra = sra2; | |
8382f19b | 57 | } |
8382f19b NB |
58 | } |
59 | ||
549e9569 NB |
60 | int sysfs_open(int devnum, char *devname, char *attr) |
61 | { | |
62 | char fname[50]; | |
549e9569 | 63 | int fd; |
1e4bc070 | 64 | char *mdname = devnum2devname(devnum); |
549e9569 | 65 | |
1e4bc070 DW |
66 | if (!mdname) |
67 | return -1; | |
68 | ||
69 | sprintf(fname, "/sys/block/%s/md/", mdname); | |
549e9569 NB |
70 | if (devname) { |
71 | strcat(fname, devname); | |
72 | strcat(fname, "/"); | |
73 | } | |
74 | strcat(fname, attr); | |
75 | fd = open(fname, O_RDWR); | |
ea6d09b0 | 76 | if (fd < 0 && errno == EACCES) |
549e9569 | 77 | fd = open(fname, O_RDONLY); |
1e4bc070 | 78 | free(mdname); |
549e9569 NB |
79 | return fd; |
80 | } | |
81 | ||
f35f2525 N |
82 | void sysfs_init(struct mdinfo *mdi, int fd, int devnum) |
83 | { | |
678a4a36 | 84 | mdi->sys_name[0] = 0; |
f35f2525 | 85 | if (fd >= 0) { |
f35f2525 | 86 | mdu_version_t vers; |
f35f2525 N |
87 | if (ioctl(fd, RAID_VERSION, &vers) != 0) |
88 | return; | |
d7ab966b | 89 | devnum = fd2devnum(fd); |
f35f2525 | 90 | } |
d7ab966b N |
91 | if (devnum == NoMdDev) |
92 | return; | |
93 | if (devnum >= 0) | |
94 | sprintf(mdi->sys_name, "md%d", devnum); | |
95 | else | |
96 | sprintf(mdi->sys_name, "md_d%d", | |
97 | -1-devnum); | |
f35f2525 N |
98 | } |
99 | ||
d7ab966b | 100 | |
7e0f6979 | 101 | struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options) |
e86c9dd6 | 102 | { |
33a6535d AW |
103 | char fname[PATH_MAX]; |
104 | char buf[PATH_MAX]; | |
e86c9dd6 NB |
105 | char *base; |
106 | char *dbase; | |
7e0f6979 | 107 | struct mdinfo *sra; |
06c7f68e | 108 | struct mdinfo *dev; |
355726fa | 109 | DIR *dir = NULL; |
e86c9dd6 NB |
110 | struct dirent *de; |
111 | ||
112 | sra = malloc(sizeof(*sra)); | |
113 | if (sra == NULL) | |
114 | return sra; | |
f35f2525 N |
115 | memset(sra, 0, sizeof(*sra)); |
116 | sysfs_init(sra, fd, devnum); | |
678a4a36 N |
117 | if (sra->sys_name[0] == 0) { |
118 | free(sra); | |
119 | return NULL; | |
120 | } | |
e86c9dd6 | 121 | |
7e0f6979 | 122 | sprintf(fname, "/sys/block/%s/md/", sra->sys_name); |
e86c9dd6 NB |
123 | base = fname + strlen(fname); |
124 | ||
125 | sra->devs = NULL; | |
8382f19b NB |
126 | if (options & GET_VERSION) { |
127 | strcpy(base, "metadata_version"); | |
128 | if (load_sys(fname, buf)) | |
129 | goto abort; | |
294d6f45 | 130 | if (strncmp(buf, "none", 4) == 0) { |
7e0f6979 NB |
131 | sra->array.major_version = |
132 | sra->array.minor_version = -1; | |
294d6f45 NB |
133 | strcpy(sra->text_version, ""); |
134 | } else if (strncmp(buf, "external:", 9) == 0) { | |
142cb9e1 NB |
135 | sra->array.major_version = -1; |
136 | sra->array.minor_version = -2; | |
137 | strcpy(sra->text_version, buf+9); | |
b8ac1967 | 138 | } else { |
8382f19b | 139 | sscanf(buf, "%d.%d", |
7e0f6979 NB |
140 | &sra->array.major_version, |
141 | &sra->array.minor_version); | |
b8ac1967 NB |
142 | strcpy(sra->text_version, buf); |
143 | } | |
8382f19b | 144 | } |
e86c9dd6 NB |
145 | if (options & GET_LEVEL) { |
146 | strcpy(base, "level"); | |
147 | if (load_sys(fname, buf)) | |
148 | goto abort; | |
7e0f6979 | 149 | sra->array.level = map_name(pers, buf); |
e86c9dd6 NB |
150 | } |
151 | if (options & GET_LAYOUT) { | |
152 | strcpy(base, "layout"); | |
153 | if (load_sys(fname, buf)) | |
154 | goto abort; | |
7e0f6979 | 155 | sra->array.layout = strtoul(buf, NULL, 0); |
e86c9dd6 | 156 | } |
549e9569 NB |
157 | if (options & GET_DISKS) { |
158 | strcpy(base, "raid_disks"); | |
159 | if (load_sys(fname, buf)) | |
160 | goto abort; | |
161 | sra->array.raid_disks = strtoul(buf, NULL, 0); | |
f1d26766 DW |
162 | } |
163 | if (options & GET_DEGRADED) { | |
164 | strcpy(base, "degraded"); | |
165 | if (load_sys(fname, buf)) | |
166 | goto abort; | |
167 | sra->array.failed_disks = strtoul(buf, NULL, 0); | |
549e9569 | 168 | } |
e86c9dd6 NB |
169 | if (options & GET_COMPONENT) { |
170 | strcpy(base, "component_size"); | |
171 | if (load_sys(fname, buf)) | |
172 | goto abort; | |
173 | sra->component_size = strtoull(buf, NULL, 0); | |
353632d9 NB |
174 | /* sysfs reports "K", but we want sectors */ |
175 | sra->component_size *= 2; | |
e86c9dd6 NB |
176 | } |
177 | if (options & GET_CHUNK) { | |
178 | strcpy(base, "chunk_size"); | |
179 | if (load_sys(fname, buf)) | |
180 | goto abort; | |
7e0f6979 | 181 | sra->array.chunk_size = strtoul(buf, NULL, 0); |
e86c9dd6 | 182 | } |
758d3a8e NB |
183 | if (options & GET_CACHE) { |
184 | strcpy(base, "stripe_cache_size"); | |
185 | if (load_sys(fname, buf)) | |
186 | goto abort; | |
187 | sra->cache_size = strtoul(buf, NULL, 0); | |
188 | } | |
37dfc3d6 NB |
189 | if (options & GET_MISMATCH) { |
190 | strcpy(base, "mismatch_cnt"); | |
191 | if (load_sys(fname, buf)) | |
192 | goto abort; | |
193 | sra->mismatch_cnt = strtoul(buf, NULL, 0); | |
194 | } | |
1770662b DW |
195 | if (options & GET_SAFEMODE) { |
196 | int scale = 1; | |
197 | int dot = 0; | |
f21e18ca | 198 | unsigned i; |
1770662b DW |
199 | unsigned long msec; |
200 | size_t len; | |
201 | ||
202 | strcpy(base, "safe_mode_delay"); | |
203 | if (load_sys(fname, buf)) | |
204 | goto abort; | |
205 | ||
206 | /* remove a period, and count digits after it */ | |
207 | len = strlen(buf); | |
208 | for (i = 0; i < len; i++) { | |
209 | if (dot) { | |
210 | if (isdigit(buf[i])) { | |
211 | buf[i-1] = buf[i]; | |
212 | scale *= 10; | |
213 | } | |
214 | buf[i] = 0; | |
215 | } else if (buf[i] == '.') { | |
216 | dot=1; | |
217 | buf[i] = 0; | |
218 | } | |
219 | } | |
220 | msec = strtoul(buf, NULL, 10); | |
221 | msec = (msec * 1000) / scale; | |
222 | sra->safe_mode_delay = msec; | |
223 | } | |
e86c9dd6 NB |
224 | |
225 | if (! (options & GET_DEVS)) | |
226 | return sra; | |
227 | ||
228 | /* Get all the devices as well */ | |
229 | *base = 0; | |
230 | dir = opendir(fname); | |
231 | if (!dir) | |
232 | goto abort; | |
7e0f6979 | 233 | sra->array.spare_disks = 0; |
e86c9dd6 NB |
234 | |
235 | while ((de = readdir(dir)) != NULL) { | |
236 | char *ep; | |
237 | if (de->d_ino == 0 || | |
238 | strncmp(de->d_name, "dev-", 4) != 0) | |
239 | continue; | |
240 | strcpy(base, de->d_name); | |
241 | dbase = base + strlen(base); | |
242 | *dbase++ = '/'; | |
243 | ||
244 | dev = malloc(sizeof(*dev)); | |
245 | if (!dev) | |
246 | goto abort; | |
e86c9dd6 NB |
247 | |
248 | /* Always get slot, major, minor */ | |
249 | strcpy(dbase, "slot"); | |
4795982e DW |
250 | if (load_sys(fname, buf)) { |
251 | /* hmm... unable to read 'slot' maybe the device | |
252 | * is going away? | |
253 | */ | |
254 | strcpy(dbase, "block"); | |
255 | if (readlink(fname, buf, sizeof(buf)) < 0 && | |
256 | errno != ENAMETOOLONG) { | |
257 | /* ...yup device is gone */ | |
258 | free(dev); | |
259 | continue; | |
260 | } else { | |
261 | /* slot is unreadable but 'block' link | |
262 | * still intact... something bad is happening | |
263 | * so abort | |
264 | */ | |
265 | free(dev); | |
266 | goto abort; | |
267 | } | |
268 | ||
269 | } | |
4795982e | 270 | strcpy(dev->sys_name, de->d_name); |
06c7f68e NB |
271 | dev->disk.raid_disk = strtoul(buf, &ep, 10); |
272 | if (*ep) dev->disk.raid_disk = -1; | |
e86c9dd6 NB |
273 | |
274 | strcpy(dbase, "block/dev"); | |
dab4a513 | 275 | if (load_sys(fname, buf)) { |
b526e52d DW |
276 | /* assume this is a stale reference to a hot |
277 | * removed device | |
278 | */ | |
dab4a513 | 279 | free(dev); |
b526e52d | 280 | continue; |
dab4a513 | 281 | } |
06c7f68e | 282 | sscanf(buf, "%d:%d", &dev->disk.major, &dev->disk.minor); |
e86c9dd6 | 283 | |
dab4a513 | 284 | /* special case check for block devices that can go 'offline' */ |
b526e52d DW |
285 | strcpy(dbase, "block/device/state"); |
286 | if (load_sys(fname, buf) == 0 && | |
287 | strncmp(buf, "offline", 7) == 0) { | |
288 | free(dev); | |
289 | continue; | |
dab4a513 DW |
290 | } |
291 | ||
292 | /* finally add this disk to the array */ | |
293 | dev->next = sra->devs; | |
294 | sra->devs = dev; | |
295 | ||
e86c9dd6 NB |
296 | if (options & GET_OFFSET) { |
297 | strcpy(dbase, "offset"); | |
298 | if (load_sys(fname, buf)) | |
299 | goto abort; | |
06c7f68e | 300 | dev->data_offset = strtoull(buf, NULL, 0); |
e86c9dd6 NB |
301 | } |
302 | if (options & GET_SIZE) { | |
303 | strcpy(dbase, "size"); | |
304 | if (load_sys(fname, buf)) | |
305 | goto abort; | |
047d2e49 | 306 | dev->component_size = strtoull(buf, NULL, 0) * 2; |
e86c9dd6 NB |
307 | } |
308 | if (options & GET_STATE) { | |
06c7f68e | 309 | dev->disk.state = 0; |
e86c9dd6 NB |
310 | strcpy(dbase, "state"); |
311 | if (load_sys(fname, buf)) | |
312 | goto abort; | |
313 | if (strstr(buf, "in_sync")) | |
06c7f68e | 314 | dev->disk.state |= (1<<MD_DISK_SYNC); |
e86c9dd6 | 315 | if (strstr(buf, "faulty")) |
06c7f68e NB |
316 | dev->disk.state |= (1<<MD_DISK_FAULTY); |
317 | if (dev->disk.state == 0) | |
7e0f6979 | 318 | sra->array.spare_disks++; |
e86c9dd6 NB |
319 | } |
320 | if (options & GET_ERROR) { | |
321 | strcpy(buf, "errors"); | |
322 | if (load_sys(fname, buf)) | |
323 | goto abort; | |
324 | dev->errors = strtoul(buf, NULL, 0); | |
325 | } | |
326 | } | |
355726fa | 327 | closedir(dir); |
e86c9dd6 NB |
328 | return sra; |
329 | ||
330 | abort: | |
355726fa NB |
331 | if (dir) |
332 | closedir(dir); | |
8382f19b | 333 | sysfs_free(sra); |
e86c9dd6 NB |
334 | return NULL; |
335 | } | |
336 | ||
1770662b DW |
337 | int sysfs_attr_match(const char *attr, const char *str) |
338 | { | |
339 | /* See if attr, read from a sysfs file, matches | |
340 | * str. They must either be the same, or attr can | |
341 | * have a trailing newline or comma | |
342 | */ | |
343 | while (*attr && *str && *attr == *str) { | |
344 | attr++; | |
345 | str++; | |
346 | } | |
347 | ||
348 | if (*str || (*attr && *attr != ',' && *attr != '\n')) | |
349 | return 0; | |
350 | return 1; | |
351 | } | |
352 | ||
353 | int sysfs_match_word(const char *word, char **list) | |
354 | { | |
355 | int n; | |
356 | for (n=0; list[n]; n++) | |
357 | if (sysfs_attr_match(word, list[n])) | |
358 | break; | |
359 | return n; | |
360 | } | |
361 | ||
e86c9dd6 NB |
362 | unsigned long long get_component_size(int fd) |
363 | { | |
364 | /* Find out the component size of the array. | |
365 | * We cannot trust GET_ARRAY_INFO ioctl as it's | |
366 | * size field is only 32bits. | |
367 | * So look in /sys/block/mdXXX/md/component_size | |
353632d9 | 368 | * |
8686f3ed | 369 | * This returns in units of sectors. |
e86c9dd6 NB |
370 | */ |
371 | struct stat stb; | |
372 | char fname[50]; | |
373 | int n; | |
374 | if (fstat(fd, &stb)) return 0; | |
f21e18ca | 375 | if (major(stb.st_rdev) != (unsigned)get_mdp_major()) |
e86c9dd6 | 376 | sprintf(fname, "/sys/block/md%d/md/component_size", |
ea24acd0 | 377 | (int)minor(stb.st_rdev)); |
e86c9dd6 NB |
378 | else |
379 | sprintf(fname, "/sys/block/md_d%d/md/component_size", | |
ea24acd0 | 380 | (int)minor(stb.st_rdev)>>MdpMinorShift); |
e86c9dd6 NB |
381 | fd = open(fname, O_RDONLY); |
382 | if (fd < 0) | |
383 | return 0; | |
384 | n = read(fd, fname, sizeof(fname)); | |
385 | close(fd); | |
386 | if (n == sizeof(fname)) | |
387 | return 0; | |
388 | fname[n] = 0; | |
8686f3ed | 389 | return strtoull(fname, NULL, 10) * 2; |
e86c9dd6 NB |
390 | } |
391 | ||
7e0f6979 | 392 | int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 NB |
393 | char *name, char *val) |
394 | { | |
395 | char fname[50]; | |
f21e18ca | 396 | unsigned int n; |
e86c9dd6 | 397 | int fd; |
7e1432fb | 398 | |
e86c9dd6 | 399 | sprintf(fname, "/sys/block/%s/md/%s/%s", |
7e0f6979 | 400 | sra->sys_name, dev?dev->sys_name:"", name); |
e86c9dd6 NB |
401 | fd = open(fname, O_WRONLY); |
402 | if (fd < 0) | |
403 | return -1; | |
404 | n = write(fd, val, strlen(val)); | |
405 | close(fd); | |
2a24d7b6 DW |
406 | if (n != strlen(val)) { |
407 | dprintf(Name ": failed to write '%s' to '%s' (%s)\n", | |
408 | val, fname, strerror(errno)); | |
e86c9dd6 | 409 | return -1; |
2a24d7b6 | 410 | } |
e86c9dd6 NB |
411 | return 0; |
412 | } | |
413 | ||
7e0f6979 | 414 | int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 NB |
415 | char *name, unsigned long long val) |
416 | { | |
417 | char valstr[50]; | |
418 | sprintf(valstr, "%llu", val); | |
419 | return sysfs_set_str(sra, dev, name, valstr); | |
420 | } | |
421 | ||
97590376 N |
422 | int sysfs_uevent(struct mdinfo *sra, char *event) |
423 | { | |
424 | char fname[50]; | |
425 | int n; | |
426 | int fd; | |
427 | ||
428 | sprintf(fname, "/sys/block/%s/uevent", | |
429 | sra->sys_name); | |
430 | fd = open(fname, O_WRONLY); | |
431 | if (fd < 0) | |
432 | return -1; | |
433 | n = write(fd, event, strlen(event)); | |
434 | close(fd); | |
435 | return 0; | |
436 | } | |
437 | ||
bc77ed53 DW |
438 | int sysfs_attribute_available(struct mdinfo *sra, struct mdinfo *dev, char *name) |
439 | { | |
440 | char fname[50]; | |
441 | struct stat st; | |
442 | ||
443 | sprintf(fname, "/sys/block/%s/md/%s/%s", | |
444 | sra->sys_name, dev?dev->sys_name:"", name); | |
445 | ||
446 | return stat(fname, &st) == 0; | |
447 | } | |
448 | ||
a6288483 N |
449 | int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
450 | char *name) | |
e86c9dd6 NB |
451 | { |
452 | char fname[50]; | |
e86c9dd6 | 453 | int fd; |
a6288483 | 454 | |
e86c9dd6 | 455 | sprintf(fname, "/sys/block/%s/md/%s/%s", |
7e0f6979 | 456 | sra->sys_name, dev?dev->sys_name:"", name); |
a6288483 | 457 | fd = open(fname, O_RDWR); |
e86c9dd6 | 458 | if (fd < 0) |
a6288483 N |
459 | fd = open(fname, O_RDONLY); |
460 | return fd; | |
461 | } | |
462 | ||
463 | int sysfs_fd_get_ll(int fd, unsigned long long *val) | |
464 | { | |
465 | char buf[50]; | |
466 | int n; | |
467 | char *ep; | |
468 | ||
469 | lseek(fd, 0, 0); | |
e86c9dd6 | 470 | n = read(fd, buf, sizeof(buf)); |
e86c9dd6 NB |
471 | if (n <= 0) |
472 | return -1; | |
473 | buf[n] = 0; | |
474 | *val = strtoull(buf, &ep, 0); | |
475 | if (ep == buf || (*ep != 0 && *ep != '\n' && *ep != ' ')) | |
476 | return -1; | |
477 | return 0; | |
478 | } | |
2503d23b | 479 | |
a6288483 N |
480 | int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
481 | char *name, unsigned long long *val) | |
482 | { | |
483 | int n; | |
484 | int fd; | |
485 | ||
486 | fd = sysfs_get_fd(sra, dev, name); | |
487 | if (fd < 0) | |
488 | return -1; | |
489 | n = sysfs_fd_get_ll(fd, val); | |
490 | close(fd); | |
491 | return n; | |
492 | } | |
493 | ||
7236ee7a N |
494 | int sysfs_fd_get_str(int fd, char *val, int size) |
495 | { | |
496 | int n; | |
497 | ||
498 | lseek(fd, 0, 0); | |
499 | n = read(fd, val, size); | |
500 | if (n <= 0) | |
501 | return -1; | |
502 | val[n] = 0; | |
503 | return n; | |
504 | } | |
505 | ||
93ecfa01 N |
506 | int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
507 | char *name, char *val, int size) | |
508 | { | |
93ecfa01 N |
509 | int n; |
510 | int fd; | |
7236ee7a N |
511 | |
512 | fd = sysfs_get_fd(sra, dev, name); | |
93ecfa01 N |
513 | if (fd < 0) |
514 | return -1; | |
7236ee7a | 515 | n = sysfs_fd_get_str(fd, val, size); |
93ecfa01 | 516 | close(fd); |
93ecfa01 N |
517 | return n; |
518 | } | |
519 | ||
8ed3e5e1 DW |
520 | int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms) |
521 | { | |
522 | unsigned long sec; | |
523 | unsigned long msec; | |
524 | char delay[30]; | |
525 | ||
526 | sec = ms / 1000; | |
0dd3ba30 | 527 | msec = ms % 1000; |
8ed3e5e1 | 528 | |
0dd3ba30 DW |
529 | sprintf(delay, "%ld.%03ld\n", sec, msec); |
530 | /* this '\n' ^ needed for kernels older than 2.6.28 */ | |
8ed3e5e1 DW |
531 | return sysfs_set_str(sra, NULL, "safe_mode_delay", delay); |
532 | } | |
533 | ||
f35f2525 | 534 | int sysfs_set_array(struct mdinfo *info, int vers) |
2503d23b NB |
535 | { |
536 | int rv = 0; | |
f35f2525 N |
537 | char ver[100]; |
538 | ||
539 | ver[0] = 0; | |
540 | if (info->array.major_version == -1 && | |
541 | info->array.minor_version == -2) { | |
542 | strcat(strcpy(ver, "external:"), info->text_version); | |
543 | ||
544 | if ((vers % 100) < 2 || | |
545 | sysfs_set_str(info, NULL, "metadata_version", | |
546 | ver) < 0) { | |
547 | fprintf(stderr, Name ": This kernel does not " | |
548 | "support external metadata.\n"); | |
549 | return 1; | |
550 | } | |
551 | } | |
2503d23b NB |
552 | if (info->array.level < 0) |
553 | return 0; /* FIXME */ | |
f35f2525 | 554 | rv |= sysfs_set_str(info, NULL, "level", |
2503d23b | 555 | map_num(pers, info->array.level)); |
f35f2525 N |
556 | rv |= sysfs_set_num(info, NULL, "raid_disks", info->array.raid_disks); |
557 | rv |= sysfs_set_num(info, NULL, "chunk_size", info->array.chunk_size); | |
558 | rv |= sysfs_set_num(info, NULL, "layout", info->array.layout); | |
559 | rv |= sysfs_set_num(info, NULL, "component_size", info->component_size/2); | |
da9b4a62 DW |
560 | if (info->custom_array_size) { |
561 | int rc; | |
562 | ||
563 | rc = sysfs_set_num(info, NULL, "array_size", | |
564 | info->custom_array_size/2); | |
565 | if (rc && errno == ENOENT) { | |
566 | fprintf(stderr, Name ": This kernel does not " | |
567 | "have the md/array_size attribute, " | |
568 | "the array may be larger than expected\n"); | |
569 | rc = 0; | |
570 | } | |
571 | rv |= rc; | |
572 | } | |
573 | ||
f35f2525 N |
574 | if (info->array.level > 0) |
575 | rv |= sysfs_set_num(info, NULL, "resync_start", info->resync_start); | |
2503d23b NB |
576 | return rv; |
577 | } | |
578 | ||
2904b26f | 579 | int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume) |
2503d23b | 580 | { |
33a6535d AW |
581 | char dv[PATH_MAX]; |
582 | char nm[PATH_MAX]; | |
2503d23b NB |
583 | char *dname; |
584 | int rv; | |
585 | ||
586 | sprintf(dv, "%d:%d", sd->disk.major, sd->disk.minor); | |
587 | rv = sysfs_set_str(sra, NULL, "new_dev", dv); | |
588 | if (rv) | |
589 | return rv; | |
590 | ||
591 | memset(nm, 0, sizeof(nm)); | |
592 | sprintf(dv, "/sys/dev/block/%d:%d", sd->disk.major, sd->disk.minor); | |
73649188 N |
593 | rv = readlink(dv, nm, sizeof(nm)); |
594 | if (rv <= 0) | |
2503d23b | 595 | return -1; |
73649188 | 596 | nm[rv] = '\0'; |
2503d23b NB |
597 | dname = strrchr(nm, '/'); |
598 | if (dname) dname++; | |
599 | strcpy(sd->sys_name, "dev-"); | |
600 | strcpy(sd->sys_name+4, dname); | |
601 | ||
2904b26f DW |
602 | /* test write to see if 'recovery_start' is available */ |
603 | if (resume && sd->recovery_start < MaxSector && | |
604 | sysfs_set_num(sra, sd, "recovery_start", 0)) { | |
605 | sysfs_set_str(sra, sd, "state", "remove"); | |
606 | return -1; | |
607 | } | |
608 | ||
73649188 | 609 | rv = sysfs_set_num(sra, sd, "offset", sd->data_offset); |
2503d23b NB |
610 | rv |= sysfs_set_num(sra, sd, "size", (sd->component_size+1) / 2); |
611 | if (sra->array.level != LEVEL_CONTAINER) { | |
d23534e4 | 612 | if (sd->recovery_start == MaxSector) |
462906cd N |
613 | /* This can correctly fail if array isn't started, |
614 | * yet, so just ignore status for now. | |
615 | */ | |
d23534e4 | 616 | sysfs_set_str(sra, sd, "state", "insync"); |
2503d23b | 617 | rv |= sysfs_set_num(sra, sd, "slot", sd->disk.raid_disk); |
2904b26f DW |
618 | if (resume) |
619 | sysfs_set_num(sra, sd, "recovery_start", sd->recovery_start); | |
2503d23b | 620 | } |
2503d23b NB |
621 | return rv; |
622 | } | |
90c8b707 | 623 | |
755c99fa | 624 | #if 0 |
90c8b707 DW |
625 | int sysfs_disk_to_sg(int fd) |
626 | { | |
627 | /* from an open block device, try find and open its corresponding | |
628 | * scsi_generic interface | |
629 | */ | |
630 | struct stat st; | |
631 | char path[256]; | |
632 | char sg_path[256]; | |
633 | char sg_major_minor[8]; | |
634 | char *c; | |
635 | DIR *dir; | |
636 | struct dirent *de; | |
637 | int major, minor, rv; | |
638 | ||
639 | if (fstat(fd, &st)) | |
640 | return -1; | |
641 | ||
642 | snprintf(path, sizeof(path), "/sys/dev/block/%d:%d/device", | |
643 | major(st.st_rdev), minor(st.st_rdev)); | |
644 | ||
645 | dir = opendir(path); | |
646 | if (!dir) | |
647 | return -1; | |
648 | ||
649 | de = readdir(dir); | |
650 | while (de) { | |
651 | if (strncmp("scsi_generic:", de->d_name, | |
652 | strlen("scsi_generic:")) == 0) | |
653 | break; | |
654 | de = readdir(dir); | |
655 | } | |
656 | closedir(dir); | |
657 | ||
658 | if (!de) | |
659 | return -1; | |
660 | ||
661 | snprintf(sg_path, sizeof(sg_path), "%s/%s/dev", path, de->d_name); | |
662 | fd = open(sg_path, O_RDONLY); | |
663 | if (fd < 0) | |
664 | return fd; | |
665 | ||
666 | rv = read(fd, sg_major_minor, sizeof(sg_major_minor)); | |
667 | close(fd); | |
668 | if (rv < 0) | |
669 | return -1; | |
670 | else | |
671 | sg_major_minor[rv - 1] = '\0'; | |
672 | ||
673 | c = strchr(sg_major_minor, ':'); | |
674 | *c = '\0'; | |
675 | c++; | |
676 | major = strtol(sg_major_minor, NULL, 10); | |
677 | minor = strtol(c, NULL, 10); | |
678 | snprintf(path, sizeof(path), "/dev/.tmp.md.%d:%d:%d", | |
679 | (int) getpid(), major, minor); | |
680 | if (mknod(path, S_IFCHR|0600, makedev(major, minor))==0) { | |
681 | fd = open(path, O_RDONLY); | |
682 | unlink(path); | |
683 | return fd; | |
684 | } | |
685 | ||
686 | return -1; | |
687 | } | |
755c99fa | 688 | #endif |
90c8b707 | 689 | |
f1665f72 DW |
690 | int sysfs_disk_to_scsi_id(int fd, __u32 *id) |
691 | { | |
692 | /* from an open block device, try to retrieve it scsi_id */ | |
693 | struct stat st; | |
694 | char path[256]; | |
695 | char *c1, *c2; | |
696 | DIR *dir; | |
697 | struct dirent *de; | |
698 | ||
699 | if (fstat(fd, &st)) | |
700 | return 1; | |
701 | ||
702 | snprintf(path, sizeof(path), "/sys/dev/block/%d:%d/device", | |
703 | major(st.st_rdev), minor(st.st_rdev)); | |
704 | ||
705 | dir = opendir(path); | |
706 | if (!dir) | |
707 | return 1; | |
708 | ||
709 | de = readdir(dir); | |
710 | while (de) { | |
711 | if (strncmp("scsi_disk:", de->d_name, | |
712 | strlen("scsi_disk:")) == 0) | |
713 | break; | |
714 | de = readdir(dir); | |
715 | } | |
716 | closedir(dir); | |
717 | ||
718 | if (!de) | |
719 | return 1; | |
720 | ||
721 | c1 = strchr(de->d_name, ':'); | |
722 | c1++; | |
723 | c2 = strchr(c1, ':'); | |
724 | *c2 = '\0'; | |
725 | *id = strtol(c1, NULL, 10) << 24; /* host */ | |
726 | c1 = c2 + 1; | |
727 | c2 = strchr(c1, ':'); | |
728 | *c2 = '\0'; | |
729 | *id |= strtol(c1, NULL, 10) << 16; /* channel */ | |
730 | c1 = c2 + 1; | |
731 | c2 = strchr(c1, ':'); | |
732 | *c2 = '\0'; | |
733 | *id |= strtol(c1, NULL, 10) << 8; /* lun */ | |
734 | c1 = c2 + 1; | |
735 | *id |= strtol(c1, NULL, 10); /* id */ | |
736 | ||
737 | return 0; | |
738 | } | |
f94d52f4 NB |
739 | |
740 | ||
741 | int sysfs_unique_holder(int devnum, long rdev) | |
742 | { | |
743 | /* Check that devnum is a holder of rdev, | |
744 | * and is the only holder. | |
745 | * we should be locked against races by | |
746 | * an O_EXCL on devnum | |
747 | */ | |
748 | DIR *dir; | |
749 | struct dirent *de; | |
750 | char dirname[100]; | |
751 | char l; | |
752 | int found = 0; | |
753 | sprintf(dirname, "/sys/dev/block/%d:%d/holders", | |
754 | major(rdev), minor(rdev)); | |
755 | dir = opendir(dirname); | |
756 | errno = ENOENT; | |
757 | if (!dir) | |
758 | return 0; | |
759 | l = strlen(dirname); | |
760 | while ((de = readdir(dir)) != NULL) { | |
761 | char buf[10]; | |
762 | int n; | |
763 | int mj, mn; | |
764 | char c; | |
765 | int fd; | |
766 | ||
767 | if (de->d_ino == 0) | |
768 | continue; | |
769 | if (de->d_name[0] == '.') | |
770 | continue; | |
771 | strcpy(dirname+l, "/"); | |
772 | strcat(dirname+l, de->d_name); | |
773 | strcat(dirname+l, "/dev"); | |
774 | fd = open(dirname, O_RDONLY); | |
775 | if (fd < 0) { | |
776 | errno = ENOENT; | |
777 | break; | |
778 | } | |
779 | n = read(fd, buf, sizeof(buf)-1); | |
780 | close(fd); | |
781 | buf[n] = 0; | |
782 | if (sscanf(buf, "%d:%d%c", &mj, &mn, &c) != 3 || | |
783 | c != '\n') { | |
784 | errno = ENOENT; | |
785 | break; | |
786 | } | |
787 | if (mj != MD_MAJOR) | |
788 | mn = -1-(mn>>6); | |
789 | ||
790 | if (devnum != mn) { | |
791 | errno = EEXIST; | |
792 | break; | |
793 | } | |
794 | found = 1; | |
795 | } | |
796 | closedir(dir); | |
797 | if (de) | |
798 | return 0; | |
799 | else | |
800 | return found; | |
801 | } | |
38a07ed6 | 802 | |
bc77ed53 DW |
803 | int sysfs_freeze_array(struct mdinfo *sra) |
804 | { | |
805 | /* Try to freeze resync/rebuild on this array/container. | |
806 | * Return -1 if the array is busy, | |
807 | * return -2 container cannot be frozen, | |
808 | * return 0 if this kernel doesn't support 'frozen' | |
809 | * return 1 if it worked. | |
810 | */ | |
811 | char buf[20]; | |
812 | ||
813 | if (!sysfs_attribute_available(sra, NULL, "sync_action")) | |
814 | return 1; /* no sync_action == frozen */ | |
815 | if (sysfs_get_str(sra, NULL, "sync_action", buf, 20) <= 0) | |
816 | return 0; | |
817 | if (strcmp(buf, "idle\n") != 0 && | |
818 | strcmp(buf, "frozen\n") != 0) | |
819 | return -1; | |
820 | if (sysfs_set_str(sra, NULL, "sync_action", "frozen") < 0) | |
821 | return 0; | |
822 | return 1; | |
823 | } | |
824 | ||
38a07ed6 N |
825 | #ifndef MDASSEMBLE |
826 | ||
827 | static char *clean_states[] = { | |
828 | "clear", "inactive", "readonly", "read-auto", "clean", NULL }; | |
829 | ||
9f1da824 | 830 | int WaitClean(char *dev, int sock, int verbose) |
38a07ed6 N |
831 | { |
832 | int fd; | |
833 | struct mdinfo *mdi; | |
834 | int rv = 1; | |
835 | int devnum; | |
836 | ||
837 | fd = open(dev, O_RDONLY); | |
838 | if (fd < 0) { | |
839 | if (verbose) | |
840 | fprintf(stderr, Name ": Couldn't open %s: %s\n", dev, strerror(errno)); | |
841 | return 1; | |
842 | } | |
843 | ||
844 | devnum = fd2devnum(fd); | |
845 | mdi = sysfs_read(fd, devnum, GET_VERSION|GET_LEVEL|GET_SAFEMODE); | |
846 | if (!mdi) { | |
847 | if (verbose) | |
848 | fprintf(stderr, Name ": Failed to read sysfs attributes for " | |
849 | "%s\n", dev); | |
850 | close(fd); | |
851 | return 0; | |
852 | } | |
853 | ||
854 | switch(mdi->array.level) { | |
855 | case LEVEL_LINEAR: | |
856 | case LEVEL_MULTIPATH: | |
857 | case 0: | |
858 | /* safemode delay is irrelevant for these levels */ | |
859 | rv = 0; | |
860 | ||
861 | } | |
862 | ||
863 | /* for internal metadata the kernel handles the final clean | |
864 | * transition, containers can never be dirty | |
865 | */ | |
866 | if (!is_subarray(mdi->text_version)) | |
867 | rv = 0; | |
868 | ||
869 | /* safemode disabled ? */ | |
870 | if (mdi->safe_mode_delay == 0) | |
871 | rv = 0; | |
872 | ||
873 | if (rv) { | |
874 | int state_fd = sysfs_open(fd2devnum(fd), NULL, "array_state"); | |
875 | char buf[20]; | |
876 | fd_set fds; | |
877 | struct timeval tm; | |
878 | ||
879 | /* minimize the safe_mode_delay and prepare to wait up to 5s | |
880 | * for writes to quiesce | |
881 | */ | |
882 | sysfs_set_safemode(mdi, 1); | |
883 | tm.tv_sec = 5; | |
884 | tm.tv_usec = 0; | |
885 | ||
38a07ed6 N |
886 | FD_ZERO(&fds); |
887 | ||
888 | /* wait for array_state to be clean */ | |
889 | while (1) { | |
890 | rv = read(state_fd, buf, sizeof(buf)); | |
891 | if (rv < 0) | |
892 | break; | |
893 | if (sysfs_match_word(buf, clean_states) <= 4) | |
894 | break; | |
895 | FD_SET(state_fd, &fds); | |
896 | rv = select(state_fd + 1, NULL, NULL, &fds, &tm); | |
897 | if (rv < 0 && errno != EINTR) | |
898 | break; | |
899 | lseek(state_fd, 0, SEEK_SET); | |
900 | } | |
901 | if (rv < 0) | |
902 | rv = 1; | |
9f1da824 DW |
903 | else if (fping_monitor(sock) == 0 || |
904 | ping_monitor(mdi->text_version) == 0) { | |
38a07ed6 N |
905 | /* we need to ping to close the window between array |
906 | * state transitioning to clean and the metadata being | |
907 | * marked clean | |
908 | */ | |
909 | rv = 0; | |
910 | } else | |
911 | rv = 1; | |
912 | if (rv && verbose) | |
913 | fprintf(stderr, Name ": Error waiting for %s to be clean\n", | |
914 | dev); | |
915 | ||
916 | /* restore the original safe_mode_delay */ | |
917 | sysfs_set_safemode(mdi, mdi->safe_mode_delay); | |
918 | close(state_fd); | |
919 | } | |
920 | ||
921 | sysfs_free(mdi); | |
922 | close(fd); | |
923 | ||
924 | return rv; | |
925 | } | |
926 | #endif /* MDASSEMBLE */ |