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Commit | Line | Data |
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52826846 | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
52826846 | 3 | * |
e736b623 | 4 | * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de> |
52826846 NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
e736b623 | 22 | * Email: <neilb@suse.de> |
52826846 NB |
23 | */ |
24 | ||
9a9dab36 | 25 | #include "mdadm.h" |
52826846 NB |
26 | #include "md_p.h" |
27 | #include "md_u.h" | |
e0d19036 | 28 | #include <sys/wait.h> |
98127a6d | 29 | #include <signal.h> |
4450e59f | 30 | #include <limits.h> |
773135f5 | 31 | #include <syslog.h> |
52826846 | 32 | |
e27d562b NB |
33 | /* The largest number of disks current arrays can manage is 384 |
34 | * This really should be dynamically, but that will have to wait | |
35 | * At least it isn't MD_SB_DISKS. | |
36 | */ | |
37 | #define MaxDisks 384 | |
2e0172b1 N |
38 | struct state { |
39 | char *devname; | |
40 | int devnum; /* to sync with mdstat info */ | |
41 | long utime; | |
42 | int err; | |
43 | char *spare_group; | |
44 | int active, working, failed, spare, raid; | |
45 | int expected_spares; | |
46 | int devstate[MaxDisks]; | |
47 | unsigned devid[MaxDisks]; | |
48 | int percent; | |
49 | int parent_dev; /* For subarray, devnum of parent. | |
50 | * For others, NoMdDev | |
51 | */ | |
52 | struct supertype *metadata; | |
c3621c0a ML |
53 | struct state *subarray;/* for a container it is a link to first subarray |
54 | * for a subarray it is a link to next subarray | |
55 | * in the same container */ | |
56 | struct state *parent; /* for a subarray it is a link to its container | |
57 | */ | |
2e0172b1 N |
58 | struct state *next; |
59 | }; | |
60 | ||
e0bd6a96 N |
61 | struct alert_info { |
62 | char *mailaddr; | |
63 | char *mailfrom; | |
64 | char *alert_cmd; | |
65 | int dosyslog; | |
66 | }; | |
2e0172b1 N |
67 | static int make_daemon(char *pidfile); |
68 | static int check_one_sharer(int scan); | |
e0bd6a96 | 69 | static void alert(char *event, char *dev, char *disc, struct alert_info *info); |
a90e1050 | 70 | static int check_array(struct state *st, struct mdstat_ent *mdstat, |
e0bd6a96 | 71 | int test, struct alert_info *info, |
a90e1050 | 72 | int increments); |
2e0172b1 | 73 | static int add_new_arrays(struct mdstat_ent *mdstat, struct state *statelist, |
e0bd6a96 N |
74 | int test, struct alert_info *info); |
75 | static void try_spare_migration(struct state *statelist, struct alert_info *info); | |
c3621c0a | 76 | static void link_containers_with_subarrays(struct state *list); |
2e0172b1 | 77 | |
a655e550 | 78 | int Monitor(struct mddev_dev *devlist, |
52826846 | 79 | char *mailaddr, char *alert_cmd, |
aa88f531 | 80 | int period, int daemonise, int scan, int oneshot, |
edde9560 AC |
81 | int dosyslog, int test, char *pidfile, int increments, |
82 | int share) | |
52826846 NB |
83 | { |
84 | /* | |
85 | * Every few seconds, scan every md device looking for changes | |
86 | * When a change is found, log it, possibly run the alert command, | |
87 | * and possibly send Email | |
88 | * | |
89 | * For each array, we record: | |
90 | * Update time | |
91 | * active/working/failed/spare drives | |
92 | * State of each device. | |
e0d19036 | 93 | * %rebuilt if rebuilding |
52826846 NB |
94 | * |
95 | * If the update time changes, check out all the data again | |
96 | * It is possible that we cannot get the state of each device | |
97 | * due to bugs in the md kernel module. | |
e0d19036 NB |
98 | * We also read /proc/mdstat to get rebuild percent, |
99 | * and to get state on all active devices incase of kernel bug. | |
52826846 | 100 | * |
e0d19036 NB |
101 | * Events are: |
102 | * Fail | |
103 | * An active device had Faulty set or Active/Sync removed | |
104 | * FailSpare | |
105 | * A spare device had Faulty set | |
106 | * SpareActive | |
107 | * An active device had a reverse transition | |
108 | * RebuildStarted | |
109 | * percent went from -1 to +ve | |
9a36a9b7 ZB |
110 | * RebuildNN |
111 | * percent went from below to not-below NN% | |
e0d19036 NB |
112 | * DeviceDisappeared |
113 | * Couldn't access a device which was previously visible | |
52826846 NB |
114 | * |
115 | * if we detect an array with active<raid and spare==0 | |
116 | * we look at other arrays that have same spare-group | |
117 | * If we find one with active==raid and spare>0, | |
118 | * and if we can get_disk_info and find a name | |
119 | * Then we hot-remove and hot-add to the other array | |
120 | * | |
e0d19036 NB |
121 | * If devlist is NULL, then we can monitor everything because --scan |
122 | * was given. We get an initial list from config file and add anything | |
123 | * that appears in /proc/mdstat | |
52826846 NB |
124 | */ |
125 | ||
2e0172b1 | 126 | struct state *statelist = NULL; |
52826846 | 127 | int finished = 0; |
e0d19036 | 128 | struct mdstat_ent *mdstat = NULL; |
4948b8f7 | 129 | char *mailfrom = NULL; |
e0bd6a96 | 130 | struct alert_info info; |
e0d19036 | 131 | |
d013a55e | 132 | if (!mailaddr) { |
8aec876d | 133 | mailaddr = conf_get_mailaddr(); |
d013a55e | 134 | if (mailaddr && ! scan) |
56eedc1a | 135 | fprintf(stderr, Name ": Monitor using email address \"%s\" from config file\n", |
d013a55e NB |
136 | mailaddr); |
137 | } | |
8aec876d | 138 | mailfrom = conf_get_mailfrom(); |
4948b8f7 | 139 | |
d013a55e | 140 | if (!alert_cmd) { |
8aec876d | 141 | alert_cmd = conf_get_program(); |
d013a55e | 142 | if (alert_cmd && ! scan) |
56eedc1a | 143 | fprintf(stderr, Name ": Monitor using program \"%s\" from config file\n", |
d013a55e NB |
144 | alert_cmd); |
145 | } | |
56eedc1a NB |
146 | if (scan && !mailaddr && !alert_cmd) { |
147 | fprintf(stderr, Name ": No mail address or alert command - not monitoring.\n"); | |
d013a55e | 148 | return 1; |
56eedc1a | 149 | } |
e0bd6a96 N |
150 | info.alert_cmd = alert_cmd; |
151 | info.mailaddr = mailaddr; | |
152 | info.mailfrom = mailfrom; | |
153 | info.dosyslog = dosyslog; | |
d013a55e | 154 | |
2e0172b1 N |
155 | if (daemonise) |
156 | if (make_daemon(pidfile)) | |
d013a55e | 157 | return 1; |
e0d19036 | 158 | |
2e0172b1 N |
159 | if (share) |
160 | if (check_one_sharer(scan)) | |
161 | return 1; | |
edde9560 | 162 | |
e0d19036 | 163 | if (devlist == NULL) { |
fa56eddb | 164 | struct mddev_ident *mdlist = conf_get_ident(NULL); |
e0d19036 | 165 | for (; mdlist; mdlist=mdlist->next) { |
fe056d1f N |
166 | struct state *st; |
167 | if (mdlist->devname == NULL) | |
168 | continue; | |
112cace6 N |
169 | if (strcasecmp(mdlist->devname, "<ignore>") == 0) |
170 | continue; | |
9bfc6a7d | 171 | st = calloc(1, sizeof *st); |
e0d19036 NB |
172 | if (st == NULL) |
173 | continue; | |
db2d001c N |
174 | if (mdlist->devname[0] == '/') |
175 | st->devname = strdup(mdlist->devname); | |
176 | else { | |
177 | st->devname = malloc(8+strlen(mdlist->devname)+1); | |
178 | strcpy(strcpy(st->devname, "/dev/md/"), | |
179 | mdlist->devname); | |
180 | } | |
e0d19036 | 181 | st->next = statelist; |
4450e59f | 182 | st->devnum = INT_MAX; |
e0d19036 | 183 | st->percent = -2; |
feb716e9 | 184 | st->expected_spares = mdlist->spare_disks; |
e0d19036 NB |
185 | if (mdlist->spare_group) |
186 | st->spare_group = strdup(mdlist->spare_group); | |
e0d19036 NB |
187 | statelist = st; |
188 | } | |
189 | } else { | |
a655e550 | 190 | struct mddev_dev *dv; |
e0d19036 | 191 | for (dv=devlist ; dv; dv=dv->next) { |
fa56eddb | 192 | struct mddev_ident *mdlist = conf_get_ident(dv->devname); |
9bfc6a7d | 193 | struct state *st = calloc(1, sizeof *st); |
e0d19036 NB |
194 | if (st == NULL) |
195 | continue; | |
196 | st->devname = strdup(dv->devname); | |
e0d19036 | 197 | st->next = statelist; |
4450e59f | 198 | st->devnum = INT_MAX; |
e0d19036 | 199 | st->percent = -2; |
feb716e9 | 200 | st->expected_spares = -1; |
e5329c37 NB |
201 | if (mdlist) { |
202 | st->expected_spares = mdlist->spare_disks; | |
203 | if (mdlist->spare_group) | |
204 | st->spare_group = strdup(mdlist->spare_group); | |
205 | } | |
e0d19036 NB |
206 | statelist = st; |
207 | } | |
208 | } | |
209 | ||
210 | ||
211 | while (! finished) { | |
aa88f531 | 212 | int new_found = 0; |
e0d19036 | 213 | struct state *st; |
a90e1050 | 214 | int anydegraded = 0; |
e0d19036 NB |
215 | |
216 | if (mdstat) | |
217 | free_mdstat(mdstat); | |
22a88995 | 218 | mdstat = mdstat_read(oneshot?0:1, 0); |
e0d19036 | 219 | |
2e0172b1 | 220 | for (st=statelist; st; st=st->next) |
e0bd6a96 | 221 | if (check_array(st, mdstat, test, &info, increments)) |
a90e1050 | 222 | anydegraded = 1; |
2e0172b1 | 223 | |
e0d19036 | 224 | /* now check if there are any new devices found in mdstat */ |
2e0172b1 N |
225 | if (scan) |
226 | new_found = add_new_arrays(mdstat, statelist, test, | |
e0bd6a96 | 227 | &info); |
2e0172b1 | 228 | |
e0d19036 NB |
229 | /* If an array has active < raid && spare == 0 && spare_group != NULL |
230 | * Look for another array with spare > 0 and active == raid and same spare_group | |
231 | * if found, choose a device and hotremove/hotadd | |
232 | */ | |
a90e1050 | 233 | if (share && anydegraded) |
e0bd6a96 | 234 | try_spare_migration(statelist, &info); |
aa88f531 NB |
235 | if (!new_found) { |
236 | if (oneshot) | |
237 | break; | |
238 | else | |
dd0781e5 | 239 | mdstat_wait(period); |
aa88f531 | 240 | } |
98c6faba | 241 | test = 0; |
52826846 | 242 | } |
b5e64645 NB |
243 | if (pidfile) |
244 | unlink(pidfile); | |
52826846 NB |
245 | return 0; |
246 | } | |
247 | ||
2e0172b1 N |
248 | static int make_daemon(char *pidfile) |
249 | { | |
250 | int pid = fork(); | |
251 | if (pid > 0) { | |
252 | if (!pidfile) | |
253 | printf("%d\n", pid); | |
254 | else { | |
255 | FILE *pid_file; | |
256 | pid_file=fopen(pidfile, "w"); | |
257 | if (!pid_file) | |
258 | perror("cannot create pid file"); | |
259 | else { | |
260 | fprintf(pid_file,"%d\n", pid); | |
261 | fclose(pid_file); | |
262 | } | |
263 | } | |
264 | return 0; | |
265 | } | |
266 | if (pid < 0) { | |
267 | perror("daemonise"); | |
268 | return 1; | |
269 | } | |
270 | close(0); | |
271 | open("/dev/null", O_RDWR); | |
272 | dup2(0,1); | |
273 | dup2(0,2); | |
274 | setsid(); | |
275 | return 0; | |
276 | } | |
277 | ||
278 | static int check_one_sharer(int scan) | |
279 | { | |
280 | int pid, rv; | |
281 | FILE *fp; | |
282 | char dir[20]; | |
283 | struct stat buf; | |
284 | fp = fopen("/var/run/mdadm/autorebuild.pid", "r"); | |
285 | if (fp) { | |
286 | fscanf(fp, "%d", &pid); | |
287 | sprintf(dir, "/proc/%d", pid); | |
288 | rv = stat(dir, &buf); | |
289 | if (rv != -1) { | |
290 | if (scan) { | |
291 | fprintf(stderr, Name ": Only one " | |
292 | "autorebuild process allowed" | |
293 | " in scan mode, aborting\n"); | |
294 | fclose(fp); | |
295 | return 1; | |
296 | } else { | |
297 | fprintf(stderr, Name ": Warning: One" | |
298 | " autorebuild process already" | |
299 | " running."); | |
300 | } | |
301 | } | |
302 | fclose(fp); | |
303 | } | |
304 | if (scan) { | |
305 | fp = fopen("/var/run/mdadm/autorebuild.pid", "w"); | |
306 | if (!fp) | |
307 | fprintf(stderr, Name ": Cannot create" | |
308 | " autorebuild.pid " | |
309 | "file\n"); | |
310 | else { | |
311 | pid = getpid(); | |
312 | fprintf(fp, "%d\n", pid); | |
313 | fclose(fp); | |
314 | } | |
315 | } | |
316 | return 0; | |
317 | } | |
52826846 | 318 | |
e0bd6a96 | 319 | static void alert(char *event, char *dev, char *disc, struct alert_info *info) |
52826846 | 320 | { |
773135f5 NB |
321 | int priority; |
322 | ||
e0bd6a96 | 323 | if (!info->alert_cmd && !info->mailaddr) { |
cd29a5c8 | 324 | time_t now = time(0); |
aba69144 | 325 | |
e0d19036 | 326 | printf("%1.15s: %s on %s %s\n", ctime(&now)+4, event, dev, disc?disc:"unknown device"); |
cd29a5c8 | 327 | } |
e0bd6a96 | 328 | if (info->alert_cmd) { |
52826846 NB |
329 | int pid = fork(); |
330 | switch(pid) { | |
331 | default: | |
332 | waitpid(pid, NULL, 0); | |
333 | break; | |
334 | case -1: | |
335 | break; | |
336 | case 0: | |
e0bd6a96 N |
337 | execl(info->alert_cmd, info->alert_cmd, |
338 | event, dev, disc, NULL); | |
52826846 NB |
339 | exit(2); |
340 | } | |
341 | } | |
e0bd6a96 | 342 | if (info->mailaddr && |
aba69144 | 343 | (strncmp(event, "Fail", 4)==0 || |
98c6faba | 344 | strncmp(event, "Test", 4)==0 || |
d1732eeb | 345 | strncmp(event, "Spares", 6)==0 || |
aa88f531 | 346 | strncmp(event, "Degrade", 7)==0)) { |
52826846 NB |
347 | FILE *mp = popen(Sendmail, "w"); |
348 | if (mp) { | |
008e1100 | 349 | FILE *mdstat; |
52826846 NB |
350 | char hname[256]; |
351 | gethostname(hname, sizeof(hname)); | |
352 | signal(SIGPIPE, SIG_IGN); | |
e0bd6a96 N |
353 | if (info->mailfrom) |
354 | fprintf(mp, "From: %s\n", info->mailfrom); | |
4948b8f7 NB |
355 | else |
356 | fprintf(mp, "From: " Name " monitoring <root>\n"); | |
e0bd6a96 N |
357 | fprintf(mp, "To: %s\n", info->mailaddr); |
358 | fprintf(mp, "Subject: %s event on %s:%s\n\n", | |
359 | event, dev, hname); | |
52826846 | 360 | |
e0bd6a96 N |
361 | fprintf(mp, |
362 | "This is an automatically generated" | |
363 | " mail message from " Name "\n"); | |
52826846 NB |
364 | fprintf(mp, "running on %s\n\n", hname); |
365 | ||
e0bd6a96 N |
366 | fprintf(mp, |
367 | "A %s event had been detected on" | |
368 | " md device %s.\n\n", event, dev); | |
52826846 | 369 | |
37dfc3d6 | 370 | if (disc && disc[0] != ' ') |
e0bd6a96 N |
371 | fprintf(mp, |
372 | "It could be related to" | |
373 | " component device %s.\n\n", disc); | |
37dfc3d6 NB |
374 | if (disc && disc[0] == ' ') |
375 | fprintf(mp, "Extra information:%s.\n\n", disc); | |
52826846 NB |
376 | |
377 | fprintf(mp, "Faithfully yours, etc.\n"); | |
008e1100 NB |
378 | |
379 | mdstat = fopen("/proc/mdstat", "r"); | |
380 | if (mdstat) { | |
381 | char buf[8192]; | |
382 | int n; | |
e0bd6a96 N |
383 | fprintf(mp, |
384 | "\nP.S. The /proc/mdstat file" | |
385 | " currently contains the following:\n\n"); | |
008e1100 | 386 | while ( (n=fread(buf, 1, sizeof(buf), mdstat)) > 0) |
e0bd6a96 | 387 | n=fwrite(buf, 1, n, mp); |
008e1100 NB |
388 | fclose(mdstat); |
389 | } | |
6278fb3a | 390 | pclose(mp); |
52826846 | 391 | } |
52826846 | 392 | } |
773135f5 NB |
393 | |
394 | /* log the event to syslog maybe */ | |
e0bd6a96 | 395 | if (info->dosyslog) { |
773135f5 NB |
396 | /* Log at a different severity depending on the event. |
397 | * | |
398 | * These are the critical events: */ | |
399 | if (strncmp(event, "Fail", 4)==0 || | |
400 | strncmp(event, "Degrade", 7)==0 || | |
401 | strncmp(event, "DeviceDisappeared", 17)==0) | |
402 | priority = LOG_CRIT; | |
403 | /* Good to know about, but are not failures: */ | |
404 | else if (strncmp(event, "Rebuild", 7)==0 || | |
d1732eeb NB |
405 | strncmp(event, "MoveSpare", 9)==0 || |
406 | strncmp(event, "Spares", 6) != 0) | |
773135f5 NB |
407 | priority = LOG_WARNING; |
408 | /* Everything else: */ | |
409 | else | |
410 | priority = LOG_INFO; | |
411 | ||
412 | if (disc) | |
e0bd6a96 N |
413 | syslog(priority, |
414 | "%s event detected on md device %s," | |
415 | " component device %s", event, dev, disc); | |
773135f5 | 416 | else |
e0bd6a96 N |
417 | syslog(priority, |
418 | "%s event detected on md device %s", | |
419 | event, dev); | |
773135f5 | 420 | } |
52826846 | 421 | } |
b90c0e9a | 422 | |
a90e1050 | 423 | static int check_array(struct state *st, struct mdstat_ent *mdstat, |
e0bd6a96 | 424 | int test, struct alert_info *ainfo, |
a90e1050 | 425 | int increments) |
2e0172b1 N |
426 | { |
427 | struct { int state, major, minor; } info[MaxDisks]; | |
428 | mdu_array_info_t array; | |
429 | struct mdstat_ent *mse = NULL, *mse2; | |
430 | char *dev = st->devname; | |
431 | int fd; | |
432 | int i; | |
433 | ||
434 | if (test) | |
e0bd6a96 | 435 | alert("TestMessage", dev, NULL, ainfo); |
2e0172b1 N |
436 | fd = open(dev, O_RDONLY); |
437 | if (fd < 0) { | |
438 | if (!st->err) | |
e0bd6a96 N |
439 | alert("DeviceDisappeared", dev, NULL, ainfo); |
440 | st->err=1; | |
a90e1050 | 441 | return 0; |
2e0172b1 N |
442 | } |
443 | fcntl(fd, F_SETFD, FD_CLOEXEC); | |
444 | if (ioctl(fd, GET_ARRAY_INFO, &array)<0) { | |
445 | if (!st->err) | |
e0bd6a96 N |
446 | alert("DeviceDisappeared", dev, NULL, ainfo); |
447 | st->err=1; | |
2e0172b1 | 448 | close(fd); |
a90e1050 | 449 | return 0; |
2e0172b1 N |
450 | } |
451 | /* It's much easier to list what array levels can't | |
452 | * have a device disappear than all of them that can | |
453 | */ | |
454 | if (array.level == 0 || array.level == -1) { | |
455 | if (!st->err) | |
e0bd6a96 | 456 | alert("DeviceDisappeared", dev, "Wrong-Level", ainfo); |
2e0172b1 N |
457 | st->err = 1; |
458 | close(fd); | |
a90e1050 | 459 | return 0; |
2e0172b1 N |
460 | } |
461 | if (st->devnum == INT_MAX) { | |
462 | struct stat stb; | |
463 | if (fstat(fd, &stb) == 0 && | |
464 | (S_IFMT&stb.st_mode)==S_IFBLK) { | |
465 | if (major(stb.st_rdev) == MD_MAJOR) | |
466 | st->devnum = minor(stb.st_rdev); | |
467 | else | |
468 | st->devnum = -1- (minor(stb.st_rdev)>>6); | |
469 | } | |
470 | } | |
471 | ||
472 | for (mse2 = mdstat ; mse2 ; mse2=mse2->next) | |
473 | if (mse2->devnum == st->devnum) { | |
474 | mse2->devnum = INT_MAX; /* flag it as "used" */ | |
475 | mse = mse2; | |
476 | } | |
477 | ||
478 | if (!mse) { | |
479 | /* duplicated array in statelist | |
480 | * or re-created after reading mdstat*/ | |
481 | st->err = 1; | |
482 | close(fd); | |
a90e1050 | 483 | return 0; |
2e0172b1 N |
484 | } |
485 | /* this array is in /proc/mdstat */ | |
486 | if (array.utime == 0) | |
487 | /* external arrays don't update utime, so | |
488 | * just make sure it is always different. */ | |
489 | array.utime = st->utime + 1;; | |
490 | ||
491 | if (st->utime == array.utime && | |
492 | st->failed == array.failed_disks && | |
493 | st->working == array.working_disks && | |
494 | st->spare == array.spare_disks && | |
495 | (mse == NULL || ( | |
496 | mse->percent == st->percent | |
497 | ))) { | |
498 | close(fd); | |
499 | st->err = 0; | |
a90e1050 | 500 | return 0; |
2e0172b1 N |
501 | } |
502 | if (st->utime == 0 && /* new array */ | |
503 | mse->pattern && strchr(mse->pattern, '_') /* degraded */ | |
504 | ) | |
e0bd6a96 | 505 | alert("DegradedArray", dev, NULL, ainfo); |
2e0172b1 N |
506 | |
507 | if (st->utime == 0 && /* new array */ | |
508 | st->expected_spares > 0 && | |
509 | array.spare_disks < st->expected_spares) | |
e0bd6a96 | 510 | alert("SparesMissing", dev, NULL, ainfo); |
2e0172b1 N |
511 | if (st->percent == -1 && |
512 | mse->percent >= 0) | |
e0bd6a96 | 513 | alert("RebuildStarted", dev, NULL, ainfo); |
2e0172b1 N |
514 | if (st->percent >= 0 && |
515 | mse->percent >= 0 && | |
516 | (mse->percent / increments) > (st->percent / increments)) { | |
517 | char percentalert[15]; // "RebuildNN" (10 chars) or "RebuildStarted" (15 chars) | |
518 | ||
519 | if((mse->percent / increments) == 0) | |
520 | snprintf(percentalert, sizeof(percentalert), "RebuildStarted"); | |
521 | else | |
522 | snprintf(percentalert, sizeof(percentalert), "Rebuild%02d", mse->percent); | |
523 | ||
e0bd6a96 | 524 | alert(percentalert, dev, NULL, ainfo); |
2e0172b1 N |
525 | } |
526 | ||
527 | if (mse->percent == -1 && | |
528 | st->percent >= 0) { | |
529 | /* Rebuild/sync/whatever just finished. | |
530 | * If there is a number in /mismatch_cnt, | |
531 | * we should report that. | |
532 | */ | |
533 | struct mdinfo *sra = | |
534 | sysfs_read(-1, st->devnum, GET_MISMATCH); | |
535 | if (sra && sra->mismatch_cnt > 0) { | |
536 | char cnt[40]; | |
537 | sprintf(cnt, " mismatches found: %d", sra->mismatch_cnt); | |
e0bd6a96 | 538 | alert("RebuildFinished", dev, cnt, ainfo); |
2e0172b1 | 539 | } else |
e0bd6a96 | 540 | alert("RebuildFinished", dev, NULL, ainfo); |
2e0172b1 N |
541 | if (sra) |
542 | free(sra); | |
543 | } | |
544 | st->percent = mse->percent; | |
545 | ||
546 | for (i=0; i<MaxDisks && i <= array.raid_disks + array.nr_disks; | |
547 | i++) { | |
548 | mdu_disk_info_t disc; | |
549 | disc.number = i; | |
550 | if (ioctl(fd, GET_DISK_INFO, &disc) >= 0) { | |
551 | info[i].state = disc.state; | |
552 | info[i].major = disc.major; | |
553 | info[i].minor = disc.minor; | |
554 | } else | |
555 | info[i].major = info[i].minor = 0; | |
556 | } | |
557 | ||
558 | if (strncmp(mse->metadata_version, "external:", 9) == 0 && | |
559 | is_subarray(mse->metadata_version+9)) | |
560 | st->parent_dev = | |
561 | devname2devnum(mse->metadata_version+10); | |
562 | else | |
563 | st->parent_dev = NoMdDev; | |
564 | if (st->metadata == NULL && | |
565 | st->parent_dev == NoMdDev) | |
566 | st->metadata = super_by_fd(fd, NULL); | |
567 | ||
568 | close(fd); | |
569 | ||
570 | for (i=0; i<MaxDisks; i++) { | |
571 | mdu_disk_info_t disc = {0,0,0,0,0}; | |
572 | int newstate=0; | |
573 | int change; | |
574 | char *dv = NULL; | |
575 | disc.number = i; | |
576 | if (i > array.raid_disks + array.nr_disks) { | |
577 | newstate = 0; | |
578 | disc.major = disc.minor = 0; | |
579 | } else if (info[i].major || info[i].minor) { | |
580 | newstate = info[i].state; | |
581 | dv = map_dev(info[i].major, info[i].minor, 1); | |
582 | disc.state = newstate; | |
583 | disc.major = info[i].major; | |
584 | disc.minor = info[i].minor; | |
585 | } else if (mse && mse->pattern && i < (int)strlen(mse->pattern)) { | |
586 | switch(mse->pattern[i]) { | |
587 | case 'U': newstate = 6 /* ACTIVE/SYNC */; break; | |
588 | case '_': newstate = 0; break; | |
589 | } | |
590 | disc.major = disc.minor = 0; | |
591 | } | |
592 | if (dv == NULL && st->devid[i]) | |
593 | dv = map_dev(major(st->devid[i]), | |
594 | minor(st->devid[i]), 1); | |
595 | change = newstate ^ st->devstate[i]; | |
596 | if (st->utime && change && !st->err) { | |
597 | if (i < array.raid_disks && | |
598 | (((newstate&change)&(1<<MD_DISK_FAULTY)) || | |
599 | ((st->devstate[i]&change)&(1<<MD_DISK_ACTIVE)) || | |
600 | ((st->devstate[i]&change)&(1<<MD_DISK_SYNC))) | |
601 | ) | |
e0bd6a96 | 602 | alert("Fail", dev, dv, ainfo); |
2e0172b1 N |
603 | else if (i >= array.raid_disks && |
604 | (disc.major || disc.minor) && | |
605 | st->devid[i] == makedev(disc.major, disc.minor) && | |
606 | ((newstate&change)&(1<<MD_DISK_FAULTY)) | |
607 | ) | |
e0bd6a96 | 608 | alert("FailSpare", dev, dv, ainfo); |
2e0172b1 N |
609 | else if (i < array.raid_disks && |
610 | ! (newstate & (1<<MD_DISK_REMOVED)) && | |
611 | (((st->devstate[i]&change)&(1<<MD_DISK_FAULTY)) || | |
612 | ((newstate&change)&(1<<MD_DISK_ACTIVE)) || | |
613 | ((newstate&change)&(1<<MD_DISK_SYNC))) | |
614 | ) | |
e0bd6a96 | 615 | alert("SpareActive", dev, dv, ainfo); |
2e0172b1 N |
616 | } |
617 | st->devstate[i] = newstate; | |
618 | st->devid[i] = makedev(disc.major, disc.minor); | |
619 | } | |
620 | st->active = array.active_disks; | |
621 | st->working = array.working_disks; | |
622 | st->spare = array.spare_disks; | |
623 | st->failed = array.failed_disks; | |
624 | st->utime = array.utime; | |
625 | st->raid = array.raid_disks; | |
626 | st->err = 0; | |
a90e1050 N |
627 | if ((st->active < st->raid) && st->spare == 0) |
628 | return 1; | |
629 | return 0; | |
2e0172b1 N |
630 | } |
631 | ||
632 | static int add_new_arrays(struct mdstat_ent *mdstat, struct state *statelist, | |
e0bd6a96 | 633 | int test, struct alert_info *info) |
2e0172b1 N |
634 | { |
635 | struct mdstat_ent *mse; | |
636 | int new_found = 0; | |
637 | ||
638 | for (mse=mdstat; mse; mse=mse->next) | |
639 | if (mse->devnum != INT_MAX && | |
640 | (!mse->level || /* retrieve containers */ | |
641 | (strcmp(mse->level, "raid0") != 0 && | |
642 | strcmp(mse->level, "linear") != 0)) | |
643 | ) { | |
9bfc6a7d | 644 | struct state *st = calloc(1, sizeof *st); |
2e0172b1 N |
645 | mdu_array_info_t array; |
646 | int fd; | |
647 | if (st == NULL) | |
648 | continue; | |
649 | st->devname = strdup(get_md_name(mse->devnum)); | |
650 | if ((fd = open(st->devname, O_RDONLY)) < 0 || | |
651 | ioctl(fd, GET_ARRAY_INFO, &array)< 0) { | |
652 | /* no such array */ | |
653 | if (fd >=0) close(fd); | |
654 | put_md_name(st->devname); | |
655 | free(st->devname); | |
656 | if (st->metadata) { | |
657 | st->metadata->ss->free_super(st->metadata); | |
658 | free(st->metadata); | |
659 | } | |
660 | free(st); | |
661 | continue; | |
662 | } | |
663 | close(fd); | |
2e0172b1 N |
664 | st->next = statelist; |
665 | st->err = 1; | |
666 | st->devnum = mse->devnum; | |
667 | st->percent = -2; | |
2e0172b1 N |
668 | st->expected_spares = -1; |
669 | if (strncmp(mse->metadata_version, "external:", 9) == 0 && | |
670 | is_subarray(mse->metadata_version+9)) | |
671 | st->parent_dev = | |
672 | devname2devnum(mse->metadata_version+10); | |
673 | else | |
674 | st->parent_dev = NoMdDev; | |
2e0172b1 N |
675 | statelist = st; |
676 | if (test) | |
e0bd6a96 N |
677 | alert("TestMessage", st->devname, NULL, info); |
678 | alert("NewArray", st->devname, NULL, info); | |
2e0172b1 N |
679 | new_found = 1; |
680 | } | |
681 | return new_found; | |
682 | } | |
683 | ||
80e7f8c3 AC |
684 | unsigned long long min_spare_size_required(struct state *st) |
685 | { | |
686 | int fd; | |
687 | unsigned long long rv = 0; | |
688 | ||
689 | if (!st->metadata || | |
690 | !st->metadata->ss->min_acceptable_spare_size) | |
691 | return rv; | |
692 | ||
693 | fd = open(st->devname, O_RDONLY); | |
694 | if (fd < 0) | |
695 | return 0; | |
696 | st->metadata->ss->load_super(st->metadata, fd, st->devname); | |
697 | close(fd); | |
698 | rv = st->metadata->ss->min_acceptable_spare_size(st->metadata); | |
699 | st->metadata->ss->free_super(st->metadata); | |
700 | ||
701 | return rv; | |
702 | } | |
703 | ||
e78dda3b N |
704 | static int move_spare(struct state *from, struct state *to, |
705 | struct domainlist *domlist, | |
6d3d44d9 N |
706 | struct alert_info *info) |
707 | { | |
708 | struct mddev_dev devlist; | |
709 | char devname[20]; | |
80e7f8c3 | 710 | unsigned long long min_size; |
6d3d44d9 N |
711 | |
712 | /* try to remove and add */ | |
e78dda3b N |
713 | int fd1 = open(to->devname, O_RDONLY); |
714 | int fd2 = open(from->devname, O_RDONLY); | |
6d3d44d9 N |
715 | int dev = -1; |
716 | int d; | |
717 | if (fd1 < 0 || fd2 < 0) { | |
718 | if (fd1>=0) close(fd1); | |
719 | if (fd2>=0) close(fd2); | |
720 | return 0; | |
721 | } | |
80e7f8c3 | 722 | min_size = min_spare_size_required(to); |
e78dda3b N |
723 | for (d = from->raid; dev < 0 && d < MaxDisks; d++) { |
724 | if (from->devid[d] > 0 && | |
725 | from->devstate[d] == 0) { | |
80e7f8c3 AC |
726 | struct dev_policy *pol; |
727 | unsigned long long dev_size; | |
728 | ||
729 | if (min_size && | |
730 | dev_size_from_id(from->devid[d], &dev_size) && | |
731 | dev_size < min_size) | |
732 | continue; | |
733 | ||
734 | pol = devnum_policy(from->devid[d]); | |
e78dda3b N |
735 | pol_add(&pol, pol_domain, from->spare_group, NULL); |
736 | if (domain_test(domlist, pol, to->metadata->ss->name)) | |
737 | dev = from->devid[d]; | |
738 | dev_policy_free(pol); | |
6d3d44d9 N |
739 | } |
740 | } | |
741 | if (dev < 0) { | |
742 | close(fd1); | |
743 | close(fd2); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | devlist.next = NULL; | |
748 | devlist.used = 0; | |
749 | devlist.re_add = 0; | |
750 | devlist.writemostly = 0; | |
751 | devlist.devname = devname; | |
752 | sprintf(devname, "%d:%d", major(dev), minor(dev)); | |
753 | ||
754 | devlist.disposition = 'r'; | |
e78dda3b | 755 | if (Manage_subdevs(from->devname, fd2, &devlist, -1, 0) == 0) { |
6d3d44d9 | 756 | devlist.disposition = 'a'; |
e78dda3b N |
757 | if (Manage_subdevs(to->devname, fd1, &devlist, -1, 0) == 0) { |
758 | alert("MoveSpare", to->devname, from->devname, info); | |
6d3d44d9 N |
759 | close(fd1); |
760 | close(fd2); | |
761 | return 1; | |
762 | } | |
e78dda3b | 763 | else Manage_subdevs(from->devname, fd2, &devlist, -1, 0); |
6d3d44d9 N |
764 | } |
765 | close(fd1); | |
766 | close(fd2); | |
767 | return 0; | |
768 | } | |
769 | ||
e78dda3b N |
770 | static int check_donor(struct state *from, struct state *to, |
771 | struct domainlist *domlist) | |
2feb22ef | 772 | { |
66f5c4b6 N |
773 | struct state *sub; |
774 | ||
2feb22ef N |
775 | if (from == to) |
776 | return 0; | |
66f5c4b6 N |
777 | if (from->parent) |
778 | /* Cannot move from a member */ | |
2feb22ef | 779 | return 0; |
66f5c4b6 N |
780 | for (sub = from->subarray; sub; sub = sub->subarray) |
781 | /* If source array has degraded subarrays, don't | |
782 | * remove anything | |
783 | */ | |
784 | if (sub->active < sub->raid) | |
785 | return 0; | |
786 | if (from->metadata->ss->external == 0) | |
787 | if (from->active < from->raid) | |
788 | return 0; | |
2feb22ef N |
789 | if (from->spare <= 0) |
790 | return 0; | |
e78dda3b | 791 | if (domlist == NULL) |
2feb22ef | 792 | return 0; |
e78dda3b | 793 | return 1; |
2feb22ef N |
794 | } |
795 | ||
e0bd6a96 | 796 | static void try_spare_migration(struct state *statelist, struct alert_info *info) |
2e0172b1 | 797 | { |
66f5c4b6 N |
798 | struct state *from; |
799 | struct state *st; | |
c3621c0a ML |
800 | |
801 | link_containers_with_subarrays(statelist); | |
66f5c4b6 N |
802 | for (st = statelist; st; st = st->next) |
803 | if (st->active < st->raid && | |
804 | st->spare == 0) { | |
e78dda3b N |
805 | struct domainlist *domlist = NULL; |
806 | int d; | |
66f5c4b6 N |
807 | struct state *to = st; |
808 | ||
809 | if (to->parent) | |
810 | /* member of a container */ | |
811 | to = to->parent; | |
e78dda3b N |
812 | |
813 | for (d = 0; d < MaxDisks; d++) | |
814 | if (to->devid[d]) | |
815 | domainlist_add_dev(&domlist, | |
816 | to->devid[d], | |
817 | to->metadata->ss->name); | |
818 | if (to->spare_group) | |
819 | domain_add(&domlist, to->spare_group); | |
820 | ||
821 | for (from=statelist ; from ; from=from->next) | |
822 | if (check_donor(from, to, domlist) | |
823 | && move_spare(from, to, domlist, info)) | |
6d3d44d9 | 824 | break; |
e78dda3b | 825 | domain_free(domlist); |
2e0172b1 N |
826 | } |
827 | } | |
c3621c0a ML |
828 | |
829 | /* search the statelist to connect external | |
830 | * metadata subarrays with their containers | |
831 | * We always completely rebuild the tree from scratch as | |
832 | * that is safest considering the possibility of entries | |
833 | * disappearing or changing. | |
834 | */ | |
835 | static void link_containers_with_subarrays(struct state *list) | |
836 | { | |
837 | struct state *st; | |
838 | struct state *cont; | |
839 | for (st = list; st; st = st->next) { | |
840 | st->parent = NULL; | |
841 | st->subarray = NULL; | |
842 | } | |
843 | for (st = list; st; st = st->next) | |
844 | if (st->parent_dev != NoMdDev) | |
845 | for (cont = list; cont; cont = cont->next) | |
846 | if (!cont->err && | |
847 | cont->parent_dev == NoMdDev && | |
848 | cont->devnum == st->parent_dev) { | |
849 | st->parent = cont; | |
850 | st->subarray = cont->subarray; | |
851 | cont->subarray = st; | |
852 | break; | |
853 | } | |
854 | } | |
855 | ||
b90c0e9a NB |
856 | /* Not really Monitor but ... */ |
857 | int Wait(char *dev) | |
858 | { | |
859 | struct stat stb; | |
860 | int devnum; | |
861 | int rv = 1; | |
862 | ||
863 | if (stat(dev, &stb) != 0) { | |
864 | fprintf(stderr, Name ": Cannot find %s: %s\n", dev, | |
865 | strerror(errno)); | |
866 | return 2; | |
867 | } | |
c94709e8 | 868 | devnum = stat2devnum(&stb); |
b90c0e9a NB |
869 | |
870 | while(1) { | |
871 | struct mdstat_ent *ms = mdstat_read(1, 0); | |
872 | struct mdstat_ent *e; | |
873 | ||
874 | for (e=ms ; e; e=e->next) | |
875 | if (e->devnum == devnum) | |
876 | break; | |
877 | ||
878 | if (!e || e->percent < 0) { | |
e7783ee6 | 879 | if (e && e->metadata_version && |
c94709e8 DW |
880 | strncmp(e->metadata_version, "external:", 9) == 0) { |
881 | if (is_subarray(&e->metadata_version[9])) | |
882 | ping_monitor(&e->metadata_version[9]); | |
883 | else | |
884 | ping_monitor(devnum2devname(devnum)); | |
885 | } | |
b90c0e9a NB |
886 | free_mdstat(ms); |
887 | return rv; | |
888 | } | |
89a10d84 | 889 | free_mdstat(ms); |
b90c0e9a NB |
890 | rv = 0; |
891 | mdstat_wait(5); | |
892 | } | |
893 | } |