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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; | |
11877f4d | 93 | fmt_devname(mdi->sys_name, devnum); |
f35f2525 N |
94 | } |
95 | ||
d7ab966b | 96 | |
7e0f6979 | 97 | struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options) |
e86c9dd6 | 98 | { |
33a6535d AW |
99 | char fname[PATH_MAX]; |
100 | char buf[PATH_MAX]; | |
e86c9dd6 NB |
101 | char *base; |
102 | char *dbase; | |
7e0f6979 | 103 | struct mdinfo *sra; |
06c7f68e | 104 | struct mdinfo *dev; |
355726fa | 105 | DIR *dir = NULL; |
e86c9dd6 NB |
106 | struct dirent *de; |
107 | ||
108 | sra = malloc(sizeof(*sra)); | |
109 | if (sra == NULL) | |
110 | return sra; | |
f35f2525 N |
111 | memset(sra, 0, sizeof(*sra)); |
112 | sysfs_init(sra, fd, devnum); | |
678a4a36 N |
113 | if (sra->sys_name[0] == 0) { |
114 | free(sra); | |
115 | return NULL; | |
116 | } | |
e86c9dd6 | 117 | |
7e0f6979 | 118 | sprintf(fname, "/sys/block/%s/md/", sra->sys_name); |
e86c9dd6 NB |
119 | base = fname + strlen(fname); |
120 | ||
121 | sra->devs = NULL; | |
8382f19b NB |
122 | if (options & GET_VERSION) { |
123 | strcpy(base, "metadata_version"); | |
124 | if (load_sys(fname, buf)) | |
125 | goto abort; | |
294d6f45 | 126 | if (strncmp(buf, "none", 4) == 0) { |
7e0f6979 NB |
127 | sra->array.major_version = |
128 | sra->array.minor_version = -1; | |
294d6f45 NB |
129 | strcpy(sra->text_version, ""); |
130 | } else if (strncmp(buf, "external:", 9) == 0) { | |
142cb9e1 NB |
131 | sra->array.major_version = -1; |
132 | sra->array.minor_version = -2; | |
133 | strcpy(sra->text_version, buf+9); | |
b8ac1967 | 134 | } else { |
8382f19b | 135 | sscanf(buf, "%d.%d", |
7e0f6979 NB |
136 | &sra->array.major_version, |
137 | &sra->array.minor_version); | |
b8ac1967 NB |
138 | strcpy(sra->text_version, buf); |
139 | } | |
8382f19b | 140 | } |
e86c9dd6 NB |
141 | if (options & GET_LEVEL) { |
142 | strcpy(base, "level"); | |
143 | if (load_sys(fname, buf)) | |
144 | goto abort; | |
7e0f6979 | 145 | sra->array.level = map_name(pers, buf); |
e86c9dd6 NB |
146 | } |
147 | if (options & GET_LAYOUT) { | |
148 | strcpy(base, "layout"); | |
149 | if (load_sys(fname, buf)) | |
150 | goto abort; | |
7e0f6979 | 151 | sra->array.layout = strtoul(buf, NULL, 0); |
e86c9dd6 | 152 | } |
549e9569 NB |
153 | if (options & GET_DISKS) { |
154 | strcpy(base, "raid_disks"); | |
155 | if (load_sys(fname, buf)) | |
156 | goto abort; | |
157 | sra->array.raid_disks = strtoul(buf, NULL, 0); | |
f1d26766 DW |
158 | } |
159 | if (options & GET_DEGRADED) { | |
160 | strcpy(base, "degraded"); | |
161 | if (load_sys(fname, buf)) | |
162 | goto abort; | |
163 | sra->array.failed_disks = strtoul(buf, NULL, 0); | |
549e9569 | 164 | } |
e86c9dd6 NB |
165 | if (options & GET_COMPONENT) { |
166 | strcpy(base, "component_size"); | |
167 | if (load_sys(fname, buf)) | |
168 | goto abort; | |
169 | sra->component_size = strtoull(buf, NULL, 0); | |
353632d9 NB |
170 | /* sysfs reports "K", but we want sectors */ |
171 | sra->component_size *= 2; | |
e86c9dd6 NB |
172 | } |
173 | if (options & GET_CHUNK) { | |
174 | strcpy(base, "chunk_size"); | |
175 | if (load_sys(fname, buf)) | |
176 | goto abort; | |
7e0f6979 | 177 | sra->array.chunk_size = strtoul(buf, NULL, 0); |
e86c9dd6 | 178 | } |
758d3a8e NB |
179 | if (options & GET_CACHE) { |
180 | strcpy(base, "stripe_cache_size"); | |
181 | if (load_sys(fname, buf)) | |
182 | goto abort; | |
183 | sra->cache_size = strtoul(buf, NULL, 0); | |
184 | } | |
37dfc3d6 NB |
185 | if (options & GET_MISMATCH) { |
186 | strcpy(base, "mismatch_cnt"); | |
187 | if (load_sys(fname, buf)) | |
188 | goto abort; | |
189 | sra->mismatch_cnt = strtoul(buf, NULL, 0); | |
190 | } | |
1770662b DW |
191 | if (options & GET_SAFEMODE) { |
192 | int scale = 1; | |
193 | int dot = 0; | |
f21e18ca | 194 | unsigned i; |
1770662b DW |
195 | unsigned long msec; |
196 | size_t len; | |
197 | ||
198 | strcpy(base, "safe_mode_delay"); | |
199 | if (load_sys(fname, buf)) | |
200 | goto abort; | |
201 | ||
202 | /* remove a period, and count digits after it */ | |
203 | len = strlen(buf); | |
204 | for (i = 0; i < len; i++) { | |
205 | if (dot) { | |
206 | if (isdigit(buf[i])) { | |
207 | buf[i-1] = buf[i]; | |
208 | scale *= 10; | |
209 | } | |
210 | buf[i] = 0; | |
211 | } else if (buf[i] == '.') { | |
212 | dot=1; | |
213 | buf[i] = 0; | |
214 | } | |
215 | } | |
216 | msec = strtoul(buf, NULL, 10); | |
217 | msec = (msec * 1000) / scale; | |
218 | sra->safe_mode_delay = msec; | |
219 | } | |
e86c9dd6 NB |
220 | |
221 | if (! (options & GET_DEVS)) | |
222 | return sra; | |
223 | ||
224 | /* Get all the devices as well */ | |
225 | *base = 0; | |
226 | dir = opendir(fname); | |
227 | if (!dir) | |
228 | goto abort; | |
7e0f6979 | 229 | sra->array.spare_disks = 0; |
e86c9dd6 NB |
230 | |
231 | while ((de = readdir(dir)) != NULL) { | |
232 | char *ep; | |
233 | if (de->d_ino == 0 || | |
234 | strncmp(de->d_name, "dev-", 4) != 0) | |
235 | continue; | |
236 | strcpy(base, de->d_name); | |
237 | dbase = base + strlen(base); | |
238 | *dbase++ = '/'; | |
239 | ||
240 | dev = malloc(sizeof(*dev)); | |
241 | if (!dev) | |
242 | goto abort; | |
e86c9dd6 NB |
243 | |
244 | /* Always get slot, major, minor */ | |
245 | strcpy(dbase, "slot"); | |
4795982e DW |
246 | if (load_sys(fname, buf)) { |
247 | /* hmm... unable to read 'slot' maybe the device | |
248 | * is going away? | |
249 | */ | |
250 | strcpy(dbase, "block"); | |
251 | if (readlink(fname, buf, sizeof(buf)) < 0 && | |
252 | errno != ENAMETOOLONG) { | |
253 | /* ...yup device is gone */ | |
254 | free(dev); | |
255 | continue; | |
256 | } else { | |
257 | /* slot is unreadable but 'block' link | |
258 | * still intact... something bad is happening | |
259 | * so abort | |
260 | */ | |
261 | free(dev); | |
262 | goto abort; | |
263 | } | |
264 | ||
265 | } | |
4795982e | 266 | strcpy(dev->sys_name, de->d_name); |
06c7f68e NB |
267 | dev->disk.raid_disk = strtoul(buf, &ep, 10); |
268 | if (*ep) dev->disk.raid_disk = -1; | |
e86c9dd6 NB |
269 | |
270 | strcpy(dbase, "block/dev"); | |
dab4a513 | 271 | if (load_sys(fname, buf)) { |
b526e52d DW |
272 | /* assume this is a stale reference to a hot |
273 | * removed device | |
274 | */ | |
dab4a513 | 275 | free(dev); |
b526e52d | 276 | continue; |
dab4a513 | 277 | } |
06c7f68e | 278 | sscanf(buf, "%d:%d", &dev->disk.major, &dev->disk.minor); |
e86c9dd6 | 279 | |
dab4a513 | 280 | /* special case check for block devices that can go 'offline' */ |
b526e52d DW |
281 | strcpy(dbase, "block/device/state"); |
282 | if (load_sys(fname, buf) == 0 && | |
283 | strncmp(buf, "offline", 7) == 0) { | |
284 | free(dev); | |
285 | continue; | |
dab4a513 DW |
286 | } |
287 | ||
288 | /* finally add this disk to the array */ | |
289 | dev->next = sra->devs; | |
290 | sra->devs = dev; | |
291 | ||
e86c9dd6 NB |
292 | if (options & GET_OFFSET) { |
293 | strcpy(dbase, "offset"); | |
294 | if (load_sys(fname, buf)) | |
295 | goto abort; | |
06c7f68e | 296 | dev->data_offset = strtoull(buf, NULL, 0); |
e86c9dd6 NB |
297 | } |
298 | if (options & GET_SIZE) { | |
299 | strcpy(dbase, "size"); | |
300 | if (load_sys(fname, buf)) | |
301 | goto abort; | |
047d2e49 | 302 | dev->component_size = strtoull(buf, NULL, 0) * 2; |
e86c9dd6 NB |
303 | } |
304 | if (options & GET_STATE) { | |
06c7f68e | 305 | dev->disk.state = 0; |
e86c9dd6 NB |
306 | strcpy(dbase, "state"); |
307 | if (load_sys(fname, buf)) | |
308 | goto abort; | |
309 | if (strstr(buf, "in_sync")) | |
06c7f68e | 310 | dev->disk.state |= (1<<MD_DISK_SYNC); |
e86c9dd6 | 311 | if (strstr(buf, "faulty")) |
06c7f68e NB |
312 | dev->disk.state |= (1<<MD_DISK_FAULTY); |
313 | if (dev->disk.state == 0) | |
7e0f6979 | 314 | sra->array.spare_disks++; |
e86c9dd6 NB |
315 | } |
316 | if (options & GET_ERROR) { | |
317 | strcpy(buf, "errors"); | |
318 | if (load_sys(fname, buf)) | |
319 | goto abort; | |
320 | dev->errors = strtoul(buf, NULL, 0); | |
321 | } | |
322 | } | |
355726fa | 323 | closedir(dir); |
e86c9dd6 NB |
324 | return sra; |
325 | ||
326 | abort: | |
355726fa NB |
327 | if (dir) |
328 | closedir(dir); | |
8382f19b | 329 | sysfs_free(sra); |
e86c9dd6 NB |
330 | return NULL; |
331 | } | |
332 | ||
1770662b DW |
333 | int sysfs_attr_match(const char *attr, const char *str) |
334 | { | |
335 | /* See if attr, read from a sysfs file, matches | |
336 | * str. They must either be the same, or attr can | |
337 | * have a trailing newline or comma | |
338 | */ | |
339 | while (*attr && *str && *attr == *str) { | |
340 | attr++; | |
341 | str++; | |
342 | } | |
343 | ||
344 | if (*str || (*attr && *attr != ',' && *attr != '\n')) | |
345 | return 0; | |
346 | return 1; | |
347 | } | |
348 | ||
349 | int sysfs_match_word(const char *word, char **list) | |
350 | { | |
351 | int n; | |
352 | for (n=0; list[n]; n++) | |
353 | if (sysfs_attr_match(word, list[n])) | |
354 | break; | |
355 | return n; | |
356 | } | |
357 | ||
e86c9dd6 NB |
358 | unsigned long long get_component_size(int fd) |
359 | { | |
360 | /* Find out the component size of the array. | |
361 | * We cannot trust GET_ARRAY_INFO ioctl as it's | |
362 | * size field is only 32bits. | |
363 | * So look in /sys/block/mdXXX/md/component_size | |
353632d9 | 364 | * |
8686f3ed | 365 | * This returns in units of sectors. |
e86c9dd6 NB |
366 | */ |
367 | struct stat stb; | |
368 | char fname[50]; | |
369 | int n; | |
370 | if (fstat(fd, &stb)) return 0; | |
f21e18ca | 371 | if (major(stb.st_rdev) != (unsigned)get_mdp_major()) |
e86c9dd6 | 372 | sprintf(fname, "/sys/block/md%d/md/component_size", |
ea24acd0 | 373 | (int)minor(stb.st_rdev)); |
e86c9dd6 NB |
374 | else |
375 | sprintf(fname, "/sys/block/md_d%d/md/component_size", | |
ea24acd0 | 376 | (int)minor(stb.st_rdev)>>MdpMinorShift); |
e86c9dd6 NB |
377 | fd = open(fname, O_RDONLY); |
378 | if (fd < 0) | |
379 | return 0; | |
380 | n = read(fd, fname, sizeof(fname)); | |
381 | close(fd); | |
382 | if (n == sizeof(fname)) | |
383 | return 0; | |
384 | fname[n] = 0; | |
8686f3ed | 385 | return strtoull(fname, NULL, 10) * 2; |
e86c9dd6 NB |
386 | } |
387 | ||
7e0f6979 | 388 | int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 NB |
389 | char *name, char *val) |
390 | { | |
391 | char fname[50]; | |
f21e18ca | 392 | unsigned int n; |
e86c9dd6 | 393 | int fd; |
7e1432fb | 394 | |
e86c9dd6 | 395 | sprintf(fname, "/sys/block/%s/md/%s/%s", |
7e0f6979 | 396 | sra->sys_name, dev?dev->sys_name:"", name); |
e86c9dd6 NB |
397 | fd = open(fname, O_WRONLY); |
398 | if (fd < 0) | |
399 | return -1; | |
400 | n = write(fd, val, strlen(val)); | |
401 | close(fd); | |
2a24d7b6 DW |
402 | if (n != strlen(val)) { |
403 | dprintf(Name ": failed to write '%s' to '%s' (%s)\n", | |
404 | val, fname, strerror(errno)); | |
e86c9dd6 | 405 | return -1; |
2a24d7b6 | 406 | } |
e86c9dd6 NB |
407 | return 0; |
408 | } | |
409 | ||
7e0f6979 | 410 | int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 NB |
411 | char *name, unsigned long long val) |
412 | { | |
413 | char valstr[50]; | |
414 | sprintf(valstr, "%llu", val); | |
415 | return sysfs_set_str(sra, dev, name, valstr); | |
416 | } | |
417 | ||
97590376 N |
418 | int sysfs_uevent(struct mdinfo *sra, char *event) |
419 | { | |
420 | char fname[50]; | |
421 | int n; | |
422 | int fd; | |
423 | ||
424 | sprintf(fname, "/sys/block/%s/uevent", | |
425 | sra->sys_name); | |
426 | fd = open(fname, O_WRONLY); | |
427 | if (fd < 0) | |
428 | return -1; | |
429 | n = write(fd, event, strlen(event)); | |
430 | close(fd); | |
431 | return 0; | |
432 | } | |
433 | ||
bc77ed53 DW |
434 | int sysfs_attribute_available(struct mdinfo *sra, struct mdinfo *dev, char *name) |
435 | { | |
436 | char fname[50]; | |
437 | struct stat st; | |
438 | ||
439 | sprintf(fname, "/sys/block/%s/md/%s/%s", | |
440 | sra->sys_name, dev?dev->sys_name:"", name); | |
441 | ||
442 | return stat(fname, &st) == 0; | |
443 | } | |
444 | ||
a6288483 N |
445 | int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
446 | char *name) | |
e86c9dd6 NB |
447 | { |
448 | char fname[50]; | |
e86c9dd6 | 449 | int fd; |
a6288483 | 450 | |
e86c9dd6 | 451 | sprintf(fname, "/sys/block/%s/md/%s/%s", |
7e0f6979 | 452 | sra->sys_name, dev?dev->sys_name:"", name); |
a6288483 | 453 | fd = open(fname, O_RDWR); |
e86c9dd6 | 454 | if (fd < 0) |
a6288483 N |
455 | fd = open(fname, O_RDONLY); |
456 | return fd; | |
457 | } | |
458 | ||
459 | int sysfs_fd_get_ll(int fd, unsigned long long *val) | |
460 | { | |
461 | char buf[50]; | |
462 | int n; | |
463 | char *ep; | |
464 | ||
465 | lseek(fd, 0, 0); | |
e86c9dd6 | 466 | n = read(fd, buf, sizeof(buf)); |
e86c9dd6 NB |
467 | if (n <= 0) |
468 | return -1; | |
469 | buf[n] = 0; | |
470 | *val = strtoull(buf, &ep, 0); | |
471 | if (ep == buf || (*ep != 0 && *ep != '\n' && *ep != ' ')) | |
472 | return -1; | |
473 | return 0; | |
474 | } | |
2503d23b | 475 | |
a6288483 N |
476 | int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
477 | char *name, unsigned long long *val) | |
478 | { | |
479 | int n; | |
480 | int fd; | |
481 | ||
482 | fd = sysfs_get_fd(sra, dev, name); | |
483 | if (fd < 0) | |
484 | return -1; | |
485 | n = sysfs_fd_get_ll(fd, val); | |
486 | close(fd); | |
487 | return n; | |
488 | } | |
489 | ||
7236ee7a N |
490 | int sysfs_fd_get_str(int fd, char *val, int size) |
491 | { | |
492 | int n; | |
493 | ||
494 | lseek(fd, 0, 0); | |
495 | n = read(fd, val, size); | |
496 | if (n <= 0) | |
497 | return -1; | |
498 | val[n] = 0; | |
499 | return n; | |
500 | } | |
501 | ||
93ecfa01 N |
502 | int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
503 | char *name, char *val, int size) | |
504 | { | |
93ecfa01 N |
505 | int n; |
506 | int fd; | |
7236ee7a N |
507 | |
508 | fd = sysfs_get_fd(sra, dev, name); | |
93ecfa01 N |
509 | if (fd < 0) |
510 | return -1; | |
7236ee7a | 511 | n = sysfs_fd_get_str(fd, val, size); |
93ecfa01 | 512 | close(fd); |
93ecfa01 N |
513 | return n; |
514 | } | |
515 | ||
8ed3e5e1 DW |
516 | int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms) |
517 | { | |
518 | unsigned long sec; | |
519 | unsigned long msec; | |
520 | char delay[30]; | |
521 | ||
522 | sec = ms / 1000; | |
0dd3ba30 | 523 | msec = ms % 1000; |
8ed3e5e1 | 524 | |
0dd3ba30 DW |
525 | sprintf(delay, "%ld.%03ld\n", sec, msec); |
526 | /* this '\n' ^ needed for kernels older than 2.6.28 */ | |
8ed3e5e1 DW |
527 | return sysfs_set_str(sra, NULL, "safe_mode_delay", delay); |
528 | } | |
529 | ||
f35f2525 | 530 | int sysfs_set_array(struct mdinfo *info, int vers) |
2503d23b NB |
531 | { |
532 | int rv = 0; | |
f35f2525 N |
533 | char ver[100]; |
534 | ||
535 | ver[0] = 0; | |
536 | if (info->array.major_version == -1 && | |
537 | info->array.minor_version == -2) { | |
538 | strcat(strcpy(ver, "external:"), info->text_version); | |
539 | ||
540 | if ((vers % 100) < 2 || | |
541 | sysfs_set_str(info, NULL, "metadata_version", | |
542 | ver) < 0) { | |
543 | fprintf(stderr, Name ": This kernel does not " | |
544 | "support external metadata.\n"); | |
545 | return 1; | |
546 | } | |
547 | } | |
2503d23b NB |
548 | if (info->array.level < 0) |
549 | return 0; /* FIXME */ | |
f35f2525 | 550 | rv |= sysfs_set_str(info, NULL, "level", |
2503d23b | 551 | map_num(pers, info->array.level)); |
f35f2525 N |
552 | rv |= sysfs_set_num(info, NULL, "raid_disks", info->array.raid_disks); |
553 | rv |= sysfs_set_num(info, NULL, "chunk_size", info->array.chunk_size); | |
554 | rv |= sysfs_set_num(info, NULL, "layout", info->array.layout); | |
555 | rv |= sysfs_set_num(info, NULL, "component_size", info->component_size/2); | |
da9b4a62 DW |
556 | if (info->custom_array_size) { |
557 | int rc; | |
558 | ||
559 | rc = sysfs_set_num(info, NULL, "array_size", | |
560 | info->custom_array_size/2); | |
561 | if (rc && errno == ENOENT) { | |
562 | fprintf(stderr, Name ": This kernel does not " | |
563 | "have the md/array_size attribute, " | |
564 | "the array may be larger than expected\n"); | |
565 | rc = 0; | |
566 | } | |
567 | rv |= rc; | |
568 | } | |
569 | ||
f35f2525 N |
570 | if (info->array.level > 0) |
571 | rv |= sysfs_set_num(info, NULL, "resync_start", info->resync_start); | |
2503d23b NB |
572 | return rv; |
573 | } | |
574 | ||
2904b26f | 575 | int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume) |
2503d23b | 576 | { |
33a6535d AW |
577 | char dv[PATH_MAX]; |
578 | char nm[PATH_MAX]; | |
2503d23b NB |
579 | char *dname; |
580 | int rv; | |
581 | ||
582 | sprintf(dv, "%d:%d", sd->disk.major, sd->disk.minor); | |
583 | rv = sysfs_set_str(sra, NULL, "new_dev", dv); | |
584 | if (rv) | |
585 | return rv; | |
586 | ||
587 | memset(nm, 0, sizeof(nm)); | |
588 | sprintf(dv, "/sys/dev/block/%d:%d", sd->disk.major, sd->disk.minor); | |
73649188 N |
589 | rv = readlink(dv, nm, sizeof(nm)); |
590 | if (rv <= 0) | |
2503d23b | 591 | return -1; |
73649188 | 592 | nm[rv] = '\0'; |
2503d23b NB |
593 | dname = strrchr(nm, '/'); |
594 | if (dname) dname++; | |
595 | strcpy(sd->sys_name, "dev-"); | |
596 | strcpy(sd->sys_name+4, dname); | |
597 | ||
2904b26f DW |
598 | /* test write to see if 'recovery_start' is available */ |
599 | if (resume && sd->recovery_start < MaxSector && | |
600 | sysfs_set_num(sra, sd, "recovery_start", 0)) { | |
601 | sysfs_set_str(sra, sd, "state", "remove"); | |
602 | return -1; | |
603 | } | |
604 | ||
73649188 | 605 | rv = sysfs_set_num(sra, sd, "offset", sd->data_offset); |
2503d23b NB |
606 | rv |= sysfs_set_num(sra, sd, "size", (sd->component_size+1) / 2); |
607 | if (sra->array.level != LEVEL_CONTAINER) { | |
d23534e4 | 608 | if (sd->recovery_start == MaxSector) |
462906cd N |
609 | /* This can correctly fail if array isn't started, |
610 | * yet, so just ignore status for now. | |
611 | */ | |
d23534e4 | 612 | sysfs_set_str(sra, sd, "state", "insync"); |
899aead0 AK |
613 | if (sd->disk.raid_disk >= 0) |
614 | rv |= sysfs_set_num(sra, sd, "slot", sd->disk.raid_disk); | |
2904b26f DW |
615 | if (resume) |
616 | sysfs_set_num(sra, sd, "recovery_start", sd->recovery_start); | |
2503d23b | 617 | } |
2503d23b NB |
618 | return rv; |
619 | } | |
90c8b707 | 620 | |
755c99fa | 621 | #if 0 |
90c8b707 DW |
622 | int sysfs_disk_to_sg(int fd) |
623 | { | |
624 | /* from an open block device, try find and open its corresponding | |
625 | * scsi_generic interface | |
626 | */ | |
627 | struct stat st; | |
628 | char path[256]; | |
629 | char sg_path[256]; | |
630 | char sg_major_minor[8]; | |
631 | char *c; | |
632 | DIR *dir; | |
633 | struct dirent *de; | |
634 | int major, minor, rv; | |
635 | ||
636 | if (fstat(fd, &st)) | |
637 | return -1; | |
638 | ||
639 | snprintf(path, sizeof(path), "/sys/dev/block/%d:%d/device", | |
640 | major(st.st_rdev), minor(st.st_rdev)); | |
641 | ||
642 | dir = opendir(path); | |
643 | if (!dir) | |
644 | return -1; | |
645 | ||
646 | de = readdir(dir); | |
647 | while (de) { | |
648 | if (strncmp("scsi_generic:", de->d_name, | |
649 | strlen("scsi_generic:")) == 0) | |
650 | break; | |
651 | de = readdir(dir); | |
652 | } | |
653 | closedir(dir); | |
654 | ||
655 | if (!de) | |
656 | return -1; | |
657 | ||
658 | snprintf(sg_path, sizeof(sg_path), "%s/%s/dev", path, de->d_name); | |
659 | fd = open(sg_path, O_RDONLY); | |
660 | if (fd < 0) | |
661 | return fd; | |
662 | ||
663 | rv = read(fd, sg_major_minor, sizeof(sg_major_minor)); | |
664 | close(fd); | |
665 | if (rv < 0) | |
666 | return -1; | |
667 | else | |
668 | sg_major_minor[rv - 1] = '\0'; | |
669 | ||
670 | c = strchr(sg_major_minor, ':'); | |
671 | *c = '\0'; | |
672 | c++; | |
673 | major = strtol(sg_major_minor, NULL, 10); | |
674 | minor = strtol(c, NULL, 10); | |
675 | snprintf(path, sizeof(path), "/dev/.tmp.md.%d:%d:%d", | |
676 | (int) getpid(), major, minor); | |
677 | if (mknod(path, S_IFCHR|0600, makedev(major, minor))==0) { | |
678 | fd = open(path, O_RDONLY); | |
679 | unlink(path); | |
680 | return fd; | |
681 | } | |
682 | ||
683 | return -1; | |
684 | } | |
755c99fa | 685 | #endif |
90c8b707 | 686 | |
f1665f72 DW |
687 | int sysfs_disk_to_scsi_id(int fd, __u32 *id) |
688 | { | |
689 | /* from an open block device, try to retrieve it scsi_id */ | |
690 | struct stat st; | |
691 | char path[256]; | |
692 | char *c1, *c2; | |
693 | DIR *dir; | |
694 | struct dirent *de; | |
695 | ||
696 | if (fstat(fd, &st)) | |
697 | return 1; | |
698 | ||
699 | snprintf(path, sizeof(path), "/sys/dev/block/%d:%d/device", | |
700 | major(st.st_rdev), minor(st.st_rdev)); | |
701 | ||
702 | dir = opendir(path); | |
703 | if (!dir) | |
704 | return 1; | |
705 | ||
706 | de = readdir(dir); | |
707 | while (de) { | |
708 | if (strncmp("scsi_disk:", de->d_name, | |
709 | strlen("scsi_disk:")) == 0) | |
710 | break; | |
711 | de = readdir(dir); | |
712 | } | |
713 | closedir(dir); | |
714 | ||
715 | if (!de) | |
716 | return 1; | |
717 | ||
718 | c1 = strchr(de->d_name, ':'); | |
719 | c1++; | |
720 | c2 = strchr(c1, ':'); | |
721 | *c2 = '\0'; | |
722 | *id = strtol(c1, NULL, 10) << 24; /* host */ | |
723 | c1 = c2 + 1; | |
724 | c2 = strchr(c1, ':'); | |
725 | *c2 = '\0'; | |
726 | *id |= strtol(c1, NULL, 10) << 16; /* channel */ | |
727 | c1 = c2 + 1; | |
728 | c2 = strchr(c1, ':'); | |
729 | *c2 = '\0'; | |
730 | *id |= strtol(c1, NULL, 10) << 8; /* lun */ | |
731 | c1 = c2 + 1; | |
732 | *id |= strtol(c1, NULL, 10); /* id */ | |
733 | ||
734 | return 0; | |
735 | } | |
f94d52f4 NB |
736 | |
737 | ||
738 | int sysfs_unique_holder(int devnum, long rdev) | |
739 | { | |
740 | /* Check that devnum is a holder of rdev, | |
741 | * and is the only holder. | |
742 | * we should be locked against races by | |
743 | * an O_EXCL on devnum | |
744 | */ | |
745 | DIR *dir; | |
746 | struct dirent *de; | |
747 | char dirname[100]; | |
748 | char l; | |
749 | int found = 0; | |
750 | sprintf(dirname, "/sys/dev/block/%d:%d/holders", | |
751 | major(rdev), minor(rdev)); | |
752 | dir = opendir(dirname); | |
753 | errno = ENOENT; | |
754 | if (!dir) | |
755 | return 0; | |
756 | l = strlen(dirname); | |
757 | while ((de = readdir(dir)) != NULL) { | |
758 | char buf[10]; | |
759 | int n; | |
760 | int mj, mn; | |
761 | char c; | |
762 | int fd; | |
763 | ||
764 | if (de->d_ino == 0) | |
765 | continue; | |
766 | if (de->d_name[0] == '.') | |
767 | continue; | |
768 | strcpy(dirname+l, "/"); | |
769 | strcat(dirname+l, de->d_name); | |
770 | strcat(dirname+l, "/dev"); | |
771 | fd = open(dirname, O_RDONLY); | |
772 | if (fd < 0) { | |
773 | errno = ENOENT; | |
774 | break; | |
775 | } | |
776 | n = read(fd, buf, sizeof(buf)-1); | |
777 | close(fd); | |
778 | buf[n] = 0; | |
779 | if (sscanf(buf, "%d:%d%c", &mj, &mn, &c) != 3 || | |
780 | c != '\n') { | |
781 | errno = ENOENT; | |
782 | break; | |
783 | } | |
784 | if (mj != MD_MAJOR) | |
785 | mn = -1-(mn>>6); | |
786 | ||
787 | if (devnum != mn) { | |
788 | errno = EEXIST; | |
789 | break; | |
790 | } | |
791 | found = 1; | |
792 | } | |
793 | closedir(dir); | |
794 | if (de) | |
795 | return 0; | |
796 | else | |
797 | return found; | |
798 | } | |
38a07ed6 | 799 | |
bc77ed53 DW |
800 | int sysfs_freeze_array(struct mdinfo *sra) |
801 | { | |
802 | /* Try to freeze resync/rebuild on this array/container. | |
803 | * Return -1 if the array is busy, | |
804 | * return -2 container cannot be frozen, | |
805 | * return 0 if this kernel doesn't support 'frozen' | |
806 | * return 1 if it worked. | |
807 | */ | |
808 | char buf[20]; | |
809 | ||
810 | if (!sysfs_attribute_available(sra, NULL, "sync_action")) | |
811 | return 1; /* no sync_action == frozen */ | |
812 | if (sysfs_get_str(sra, NULL, "sync_action", buf, 20) <= 0) | |
813 | return 0; | |
814 | if (strcmp(buf, "idle\n") != 0 && | |
815 | strcmp(buf, "frozen\n") != 0) | |
816 | return -1; | |
817 | if (sysfs_set_str(sra, NULL, "sync_action", "frozen") < 0) | |
818 | return 0; | |
819 | return 1; | |
820 | } | |
821 | ||
38a07ed6 N |
822 | #ifndef MDASSEMBLE |
823 | ||
824 | static char *clean_states[] = { | |
825 | "clear", "inactive", "readonly", "read-auto", "clean", NULL }; | |
826 | ||
9f1da824 | 827 | int WaitClean(char *dev, int sock, int verbose) |
38a07ed6 N |
828 | { |
829 | int fd; | |
830 | struct mdinfo *mdi; | |
831 | int rv = 1; | |
832 | int devnum; | |
833 | ||
834 | fd = open(dev, O_RDONLY); | |
835 | if (fd < 0) { | |
836 | if (verbose) | |
837 | fprintf(stderr, Name ": Couldn't open %s: %s\n", dev, strerror(errno)); | |
838 | return 1; | |
839 | } | |
840 | ||
841 | devnum = fd2devnum(fd); | |
842 | mdi = sysfs_read(fd, devnum, GET_VERSION|GET_LEVEL|GET_SAFEMODE); | |
843 | if (!mdi) { | |
844 | if (verbose) | |
845 | fprintf(stderr, Name ": Failed to read sysfs attributes for " | |
846 | "%s\n", dev); | |
847 | close(fd); | |
848 | return 0; | |
849 | } | |
850 | ||
851 | switch(mdi->array.level) { | |
852 | case LEVEL_LINEAR: | |
853 | case LEVEL_MULTIPATH: | |
854 | case 0: | |
855 | /* safemode delay is irrelevant for these levels */ | |
856 | rv = 0; | |
857 | ||
858 | } | |
859 | ||
860 | /* for internal metadata the kernel handles the final clean | |
861 | * transition, containers can never be dirty | |
862 | */ | |
863 | if (!is_subarray(mdi->text_version)) | |
864 | rv = 0; | |
865 | ||
866 | /* safemode disabled ? */ | |
867 | if (mdi->safe_mode_delay == 0) | |
868 | rv = 0; | |
869 | ||
870 | if (rv) { | |
871 | int state_fd = sysfs_open(fd2devnum(fd), NULL, "array_state"); | |
872 | char buf[20]; | |
873 | fd_set fds; | |
874 | struct timeval tm; | |
875 | ||
876 | /* minimize the safe_mode_delay and prepare to wait up to 5s | |
877 | * for writes to quiesce | |
878 | */ | |
879 | sysfs_set_safemode(mdi, 1); | |
880 | tm.tv_sec = 5; | |
881 | tm.tv_usec = 0; | |
882 | ||
38a07ed6 N |
883 | FD_ZERO(&fds); |
884 | ||
885 | /* wait for array_state to be clean */ | |
886 | while (1) { | |
887 | rv = read(state_fd, buf, sizeof(buf)); | |
888 | if (rv < 0) | |
889 | break; | |
890 | if (sysfs_match_word(buf, clean_states) <= 4) | |
891 | break; | |
892 | FD_SET(state_fd, &fds); | |
893 | rv = select(state_fd + 1, NULL, NULL, &fds, &tm); | |
894 | if (rv < 0 && errno != EINTR) | |
895 | break; | |
896 | lseek(state_fd, 0, SEEK_SET); | |
897 | } | |
898 | if (rv < 0) | |
899 | rv = 1; | |
9f1da824 DW |
900 | else if (fping_monitor(sock) == 0 || |
901 | ping_monitor(mdi->text_version) == 0) { | |
38a07ed6 N |
902 | /* we need to ping to close the window between array |
903 | * state transitioning to clean and the metadata being | |
904 | * marked clean | |
905 | */ | |
906 | rv = 0; | |
907 | } else | |
908 | rv = 1; | |
909 | if (rv && verbose) | |
910 | fprintf(stderr, Name ": Error waiting for %s to be clean\n", | |
911 | dev); | |
912 | ||
913 | /* restore the original safe_mode_delay */ | |
914 | sysfs_set_safemode(mdi, mdi->safe_mode_delay); | |
915 | close(state_fd); | |
916 | } | |
917 | ||
918 | sysfs_free(mdi); | |
919 | close(fd); | |
920 | ||
921 | return rv; | |
922 | } | |
923 | #endif /* MDASSEMBLE */ |