]>
Commit | Line | Data |
---|---|---|
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]; | |
0f0749ad | 47 | dev_t devid[MaxDisks]; |
2e0172b1 N |
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" | |
a1bb2065 | 299 | " running.\n"); |
2e0172b1 N |
300 | } |
301 | } | |
302 | fclose(fp); | |
303 | } | |
304 | if (scan) { | |
a1bb2065 AC |
305 | if (mkdir("/var/run/mdadm", S_IRWXU) < 0 && |
306 | errno != EEXIST) { | |
307 | fprintf(stderr, Name ": Can't create " | |
308 | "autorebuild.pid file\n"); | |
309 | } else { | |
310 | fp = fopen("/var/run/mdadm/autorebuild.pid", "w"); | |
311 | if (!fp) | |
312 | fprintf(stderr, Name ": Cannot create" | |
313 | " autorebuild.pid" | |
314 | "file\n"); | |
315 | else { | |
316 | pid = getpid(); | |
317 | fprintf(fp, "%d\n", pid); | |
318 | fclose(fp); | |
319 | } | |
2e0172b1 N |
320 | } |
321 | } | |
322 | return 0; | |
323 | } | |
52826846 | 324 | |
e0bd6a96 | 325 | static void alert(char *event, char *dev, char *disc, struct alert_info *info) |
52826846 | 326 | { |
773135f5 NB |
327 | int priority; |
328 | ||
e0bd6a96 | 329 | if (!info->alert_cmd && !info->mailaddr) { |
cd29a5c8 | 330 | time_t now = time(0); |
aba69144 | 331 | |
e0d19036 | 332 | printf("%1.15s: %s on %s %s\n", ctime(&now)+4, event, dev, disc?disc:"unknown device"); |
cd29a5c8 | 333 | } |
e0bd6a96 | 334 | if (info->alert_cmd) { |
52826846 NB |
335 | int pid = fork(); |
336 | switch(pid) { | |
337 | default: | |
338 | waitpid(pid, NULL, 0); | |
339 | break; | |
340 | case -1: | |
341 | break; | |
342 | case 0: | |
e0bd6a96 N |
343 | execl(info->alert_cmd, info->alert_cmd, |
344 | event, dev, disc, NULL); | |
52826846 NB |
345 | exit(2); |
346 | } | |
347 | } | |
e0bd6a96 | 348 | if (info->mailaddr && |
aba69144 | 349 | (strncmp(event, "Fail", 4)==0 || |
98c6faba | 350 | strncmp(event, "Test", 4)==0 || |
d1732eeb | 351 | strncmp(event, "Spares", 6)==0 || |
aa88f531 | 352 | strncmp(event, "Degrade", 7)==0)) { |
52826846 NB |
353 | FILE *mp = popen(Sendmail, "w"); |
354 | if (mp) { | |
008e1100 | 355 | FILE *mdstat; |
52826846 NB |
356 | char hname[256]; |
357 | gethostname(hname, sizeof(hname)); | |
358 | signal(SIGPIPE, SIG_IGN); | |
e0bd6a96 N |
359 | if (info->mailfrom) |
360 | fprintf(mp, "From: %s\n", info->mailfrom); | |
4948b8f7 NB |
361 | else |
362 | fprintf(mp, "From: " Name " monitoring <root>\n"); | |
e0bd6a96 N |
363 | fprintf(mp, "To: %s\n", info->mailaddr); |
364 | fprintf(mp, "Subject: %s event on %s:%s\n\n", | |
365 | event, dev, hname); | |
52826846 | 366 | |
e0bd6a96 N |
367 | fprintf(mp, |
368 | "This is an automatically generated" | |
369 | " mail message from " Name "\n"); | |
52826846 NB |
370 | fprintf(mp, "running on %s\n\n", hname); |
371 | ||
e0bd6a96 N |
372 | fprintf(mp, |
373 | "A %s event had been detected on" | |
374 | " md device %s.\n\n", event, dev); | |
52826846 | 375 | |
37dfc3d6 | 376 | if (disc && disc[0] != ' ') |
e0bd6a96 N |
377 | fprintf(mp, |
378 | "It could be related to" | |
379 | " component device %s.\n\n", disc); | |
37dfc3d6 NB |
380 | if (disc && disc[0] == ' ') |
381 | fprintf(mp, "Extra information:%s.\n\n", disc); | |
52826846 NB |
382 | |
383 | fprintf(mp, "Faithfully yours, etc.\n"); | |
008e1100 NB |
384 | |
385 | mdstat = fopen("/proc/mdstat", "r"); | |
386 | if (mdstat) { | |
387 | char buf[8192]; | |
388 | int n; | |
e0bd6a96 N |
389 | fprintf(mp, |
390 | "\nP.S. The /proc/mdstat file" | |
391 | " currently contains the following:\n\n"); | |
008e1100 | 392 | while ( (n=fread(buf, 1, sizeof(buf), mdstat)) > 0) |
e0bd6a96 | 393 | n=fwrite(buf, 1, n, mp); |
008e1100 NB |
394 | fclose(mdstat); |
395 | } | |
6278fb3a | 396 | pclose(mp); |
52826846 | 397 | } |
52826846 | 398 | } |
773135f5 NB |
399 | |
400 | /* log the event to syslog maybe */ | |
e0bd6a96 | 401 | if (info->dosyslog) { |
773135f5 NB |
402 | /* Log at a different severity depending on the event. |
403 | * | |
404 | * These are the critical events: */ | |
405 | if (strncmp(event, "Fail", 4)==0 || | |
406 | strncmp(event, "Degrade", 7)==0 || | |
407 | strncmp(event, "DeviceDisappeared", 17)==0) | |
408 | priority = LOG_CRIT; | |
409 | /* Good to know about, but are not failures: */ | |
410 | else if (strncmp(event, "Rebuild", 7)==0 || | |
d1732eeb NB |
411 | strncmp(event, "MoveSpare", 9)==0 || |
412 | strncmp(event, "Spares", 6) != 0) | |
773135f5 NB |
413 | priority = LOG_WARNING; |
414 | /* Everything else: */ | |
415 | else | |
416 | priority = LOG_INFO; | |
417 | ||
418 | if (disc) | |
e0bd6a96 N |
419 | syslog(priority, |
420 | "%s event detected on md device %s," | |
421 | " component device %s", event, dev, disc); | |
773135f5 | 422 | else |
e0bd6a96 N |
423 | syslog(priority, |
424 | "%s event detected on md device %s", | |
425 | event, dev); | |
773135f5 | 426 | } |
52826846 | 427 | } |
b90c0e9a | 428 | |
a90e1050 | 429 | static int check_array(struct state *st, struct mdstat_ent *mdstat, |
e0bd6a96 | 430 | int test, struct alert_info *ainfo, |
a90e1050 | 431 | int increments) |
2e0172b1 | 432 | { |
ff044d6b AC |
433 | /* Update the state 'st' to reflect any changes shown in mdstat, |
434 | * or found by directly examining the array, and return | |
435 | * '1' if the array is degraded, or '0' if it is optimal (or dead). | |
436 | */ | |
2e0172b1 N |
437 | struct { int state, major, minor; } info[MaxDisks]; |
438 | mdu_array_info_t array; | |
439 | struct mdstat_ent *mse = NULL, *mse2; | |
440 | char *dev = st->devname; | |
441 | int fd; | |
442 | int i; | |
443 | ||
444 | if (test) | |
e0bd6a96 | 445 | alert("TestMessage", dev, NULL, ainfo); |
2e0172b1 N |
446 | fd = open(dev, O_RDONLY); |
447 | if (fd < 0) { | |
448 | if (!st->err) | |
e0bd6a96 N |
449 | alert("DeviceDisappeared", dev, NULL, ainfo); |
450 | st->err=1; | |
a90e1050 | 451 | return 0; |
2e0172b1 N |
452 | } |
453 | fcntl(fd, F_SETFD, FD_CLOEXEC); | |
454 | if (ioctl(fd, GET_ARRAY_INFO, &array)<0) { | |
455 | if (!st->err) | |
e0bd6a96 N |
456 | alert("DeviceDisappeared", dev, NULL, ainfo); |
457 | st->err=1; | |
2e0172b1 | 458 | close(fd); |
a90e1050 | 459 | return 0; |
2e0172b1 N |
460 | } |
461 | /* It's much easier to list what array levels can't | |
462 | * have a device disappear than all of them that can | |
463 | */ | |
464 | if (array.level == 0 || array.level == -1) { | |
465 | if (!st->err) | |
e0bd6a96 | 466 | alert("DeviceDisappeared", dev, "Wrong-Level", ainfo); |
2e0172b1 N |
467 | st->err = 1; |
468 | close(fd); | |
a90e1050 | 469 | return 0; |
2e0172b1 N |
470 | } |
471 | if (st->devnum == INT_MAX) { | |
472 | struct stat stb; | |
473 | if (fstat(fd, &stb) == 0 && | |
474 | (S_IFMT&stb.st_mode)==S_IFBLK) { | |
475 | if (major(stb.st_rdev) == MD_MAJOR) | |
476 | st->devnum = minor(stb.st_rdev); | |
477 | else | |
478 | st->devnum = -1- (minor(stb.st_rdev)>>6); | |
479 | } | |
480 | } | |
481 | ||
482 | for (mse2 = mdstat ; mse2 ; mse2=mse2->next) | |
483 | if (mse2->devnum == st->devnum) { | |
484 | mse2->devnum = INT_MAX; /* flag it as "used" */ | |
485 | mse = mse2; | |
486 | } | |
487 | ||
488 | if (!mse) { | |
489 | /* duplicated array in statelist | |
490 | * or re-created after reading mdstat*/ | |
491 | st->err = 1; | |
492 | close(fd); | |
a90e1050 | 493 | return 0; |
2e0172b1 N |
494 | } |
495 | /* this array is in /proc/mdstat */ | |
496 | if (array.utime == 0) | |
497 | /* external arrays don't update utime, so | |
498 | * just make sure it is always different. */ | |
499 | array.utime = st->utime + 1;; | |
500 | ||
501 | if (st->utime == array.utime && | |
502 | st->failed == array.failed_disks && | |
503 | st->working == array.working_disks && | |
504 | st->spare == array.spare_disks && | |
505 | (mse == NULL || ( | |
506 | mse->percent == st->percent | |
507 | ))) { | |
508 | close(fd); | |
509 | st->err = 0; | |
ff044d6b AC |
510 | if ((st->active < st->raid) && st->spare == 0) |
511 | return 1; | |
512 | else | |
513 | return 0; | |
2e0172b1 N |
514 | } |
515 | if (st->utime == 0 && /* new array */ | |
516 | mse->pattern && strchr(mse->pattern, '_') /* degraded */ | |
517 | ) | |
e0bd6a96 | 518 | alert("DegradedArray", dev, NULL, ainfo); |
2e0172b1 N |
519 | |
520 | if (st->utime == 0 && /* new array */ | |
521 | st->expected_spares > 0 && | |
522 | array.spare_disks < st->expected_spares) | |
e0bd6a96 | 523 | alert("SparesMissing", dev, NULL, ainfo); |
2e0172b1 N |
524 | if (st->percent == -1 && |
525 | mse->percent >= 0) | |
e0bd6a96 | 526 | alert("RebuildStarted", dev, NULL, ainfo); |
2e0172b1 N |
527 | if (st->percent >= 0 && |
528 | mse->percent >= 0 && | |
529 | (mse->percent / increments) > (st->percent / increments)) { | |
530 | char percentalert[15]; // "RebuildNN" (10 chars) or "RebuildStarted" (15 chars) | |
531 | ||
532 | if((mse->percent / increments) == 0) | |
533 | snprintf(percentalert, sizeof(percentalert), "RebuildStarted"); | |
534 | else | |
535 | snprintf(percentalert, sizeof(percentalert), "Rebuild%02d", mse->percent); | |
536 | ||
e0bd6a96 | 537 | alert(percentalert, dev, NULL, ainfo); |
2e0172b1 N |
538 | } |
539 | ||
540 | if (mse->percent == -1 && | |
541 | st->percent >= 0) { | |
542 | /* Rebuild/sync/whatever just finished. | |
543 | * If there is a number in /mismatch_cnt, | |
544 | * we should report that. | |
545 | */ | |
546 | struct mdinfo *sra = | |
547 | sysfs_read(-1, st->devnum, GET_MISMATCH); | |
548 | if (sra && sra->mismatch_cnt > 0) { | |
549 | char cnt[40]; | |
550 | sprintf(cnt, " mismatches found: %d", sra->mismatch_cnt); | |
e0bd6a96 | 551 | alert("RebuildFinished", dev, cnt, ainfo); |
2e0172b1 | 552 | } else |
e0bd6a96 | 553 | alert("RebuildFinished", dev, NULL, ainfo); |
2e0172b1 N |
554 | if (sra) |
555 | free(sra); | |
556 | } | |
557 | st->percent = mse->percent; | |
558 | ||
559 | for (i=0; i<MaxDisks && i <= array.raid_disks + array.nr_disks; | |
560 | i++) { | |
561 | mdu_disk_info_t disc; | |
562 | disc.number = i; | |
563 | if (ioctl(fd, GET_DISK_INFO, &disc) >= 0) { | |
564 | info[i].state = disc.state; | |
565 | info[i].major = disc.major; | |
566 | info[i].minor = disc.minor; | |
567 | } else | |
568 | info[i].major = info[i].minor = 0; | |
569 | } | |
570 | ||
571 | if (strncmp(mse->metadata_version, "external:", 9) == 0 && | |
572 | is_subarray(mse->metadata_version+9)) | |
573 | st->parent_dev = | |
574 | devname2devnum(mse->metadata_version+10); | |
575 | else | |
576 | st->parent_dev = NoMdDev; | |
577 | if (st->metadata == NULL && | |
578 | st->parent_dev == NoMdDev) | |
579 | st->metadata = super_by_fd(fd, NULL); | |
580 | ||
581 | close(fd); | |
582 | ||
583 | for (i=0; i<MaxDisks; i++) { | |
584 | mdu_disk_info_t disc = {0,0,0,0,0}; | |
585 | int newstate=0; | |
586 | int change; | |
587 | char *dv = NULL; | |
588 | disc.number = i; | |
589 | if (i > array.raid_disks + array.nr_disks) { | |
590 | newstate = 0; | |
591 | disc.major = disc.minor = 0; | |
592 | } else if (info[i].major || info[i].minor) { | |
593 | newstate = info[i].state; | |
594 | dv = map_dev(info[i].major, info[i].minor, 1); | |
595 | disc.state = newstate; | |
596 | disc.major = info[i].major; | |
597 | disc.minor = info[i].minor; | |
598 | } else if (mse && mse->pattern && i < (int)strlen(mse->pattern)) { | |
599 | switch(mse->pattern[i]) { | |
600 | case 'U': newstate = 6 /* ACTIVE/SYNC */; break; | |
601 | case '_': newstate = 0; break; | |
602 | } | |
603 | disc.major = disc.minor = 0; | |
604 | } | |
605 | if (dv == NULL && st->devid[i]) | |
606 | dv = map_dev(major(st->devid[i]), | |
607 | minor(st->devid[i]), 1); | |
608 | change = newstate ^ st->devstate[i]; | |
609 | if (st->utime && change && !st->err) { | |
610 | if (i < array.raid_disks && | |
611 | (((newstate&change)&(1<<MD_DISK_FAULTY)) || | |
612 | ((st->devstate[i]&change)&(1<<MD_DISK_ACTIVE)) || | |
613 | ((st->devstate[i]&change)&(1<<MD_DISK_SYNC))) | |
614 | ) | |
e0bd6a96 | 615 | alert("Fail", dev, dv, ainfo); |
2e0172b1 N |
616 | else if (i >= array.raid_disks && |
617 | (disc.major || disc.minor) && | |
618 | st->devid[i] == makedev(disc.major, disc.minor) && | |
619 | ((newstate&change)&(1<<MD_DISK_FAULTY)) | |
620 | ) | |
e0bd6a96 | 621 | alert("FailSpare", dev, dv, ainfo); |
2e0172b1 N |
622 | else if (i < array.raid_disks && |
623 | ! (newstate & (1<<MD_DISK_REMOVED)) && | |
624 | (((st->devstate[i]&change)&(1<<MD_DISK_FAULTY)) || | |
625 | ((newstate&change)&(1<<MD_DISK_ACTIVE)) || | |
626 | ((newstate&change)&(1<<MD_DISK_SYNC))) | |
627 | ) | |
e0bd6a96 | 628 | alert("SpareActive", dev, dv, ainfo); |
2e0172b1 N |
629 | } |
630 | st->devstate[i] = newstate; | |
631 | st->devid[i] = makedev(disc.major, disc.minor); | |
632 | } | |
633 | st->active = array.active_disks; | |
634 | st->working = array.working_disks; | |
635 | st->spare = array.spare_disks; | |
636 | st->failed = array.failed_disks; | |
637 | st->utime = array.utime; | |
638 | st->raid = array.raid_disks; | |
639 | st->err = 0; | |
a90e1050 N |
640 | if ((st->active < st->raid) && st->spare == 0) |
641 | return 1; | |
642 | return 0; | |
2e0172b1 N |
643 | } |
644 | ||
645 | static int add_new_arrays(struct mdstat_ent *mdstat, struct state *statelist, | |
e0bd6a96 | 646 | int test, struct alert_info *info) |
2e0172b1 N |
647 | { |
648 | struct mdstat_ent *mse; | |
649 | int new_found = 0; | |
650 | ||
651 | for (mse=mdstat; mse; mse=mse->next) | |
652 | if (mse->devnum != INT_MAX && | |
653 | (!mse->level || /* retrieve containers */ | |
654 | (strcmp(mse->level, "raid0") != 0 && | |
655 | strcmp(mse->level, "linear") != 0)) | |
656 | ) { | |
9bfc6a7d | 657 | struct state *st = calloc(1, sizeof *st); |
2e0172b1 N |
658 | mdu_array_info_t array; |
659 | int fd; | |
660 | if (st == NULL) | |
661 | continue; | |
662 | st->devname = strdup(get_md_name(mse->devnum)); | |
663 | if ((fd = open(st->devname, O_RDONLY)) < 0 || | |
664 | ioctl(fd, GET_ARRAY_INFO, &array)< 0) { | |
665 | /* no such array */ | |
666 | if (fd >=0) close(fd); | |
667 | put_md_name(st->devname); | |
668 | free(st->devname); | |
669 | if (st->metadata) { | |
670 | st->metadata->ss->free_super(st->metadata); | |
671 | free(st->metadata); | |
672 | } | |
673 | free(st); | |
674 | continue; | |
675 | } | |
676 | close(fd); | |
2e0172b1 N |
677 | st->next = statelist; |
678 | st->err = 1; | |
679 | st->devnum = mse->devnum; | |
680 | st->percent = -2; | |
2e0172b1 N |
681 | st->expected_spares = -1; |
682 | if (strncmp(mse->metadata_version, "external:", 9) == 0 && | |
683 | is_subarray(mse->metadata_version+9)) | |
684 | st->parent_dev = | |
685 | devname2devnum(mse->metadata_version+10); | |
686 | else | |
687 | st->parent_dev = NoMdDev; | |
2e0172b1 N |
688 | statelist = st; |
689 | if (test) | |
e0bd6a96 N |
690 | alert("TestMessage", st->devname, NULL, info); |
691 | alert("NewArray", st->devname, NULL, info); | |
2e0172b1 N |
692 | new_found = 1; |
693 | } | |
694 | return new_found; | |
695 | } | |
696 | ||
80e7f8c3 AC |
697 | unsigned long long min_spare_size_required(struct state *st) |
698 | { | |
699 | int fd; | |
700 | unsigned long long rv = 0; | |
701 | ||
702 | if (!st->metadata || | |
703 | !st->metadata->ss->min_acceptable_spare_size) | |
704 | return rv; | |
705 | ||
706 | fd = open(st->devname, O_RDONLY); | |
707 | if (fd < 0) | |
708 | return 0; | |
709 | st->metadata->ss->load_super(st->metadata, fd, st->devname); | |
710 | close(fd); | |
711 | rv = st->metadata->ss->min_acceptable_spare_size(st->metadata); | |
712 | st->metadata->ss->free_super(st->metadata); | |
713 | ||
714 | return rv; | |
715 | } | |
716 | ||
e78dda3b | 717 | static int move_spare(struct state *from, struct state *to, |
0f0749ad | 718 | dev_t devid, |
6d3d44d9 N |
719 | struct alert_info *info) |
720 | { | |
721 | struct mddev_dev devlist; | |
722 | char devname[20]; | |
723 | ||
724 | /* try to remove and add */ | |
e78dda3b N |
725 | int fd1 = open(to->devname, O_RDONLY); |
726 | int fd2 = open(from->devname, O_RDONLY); | |
0fa21e85 | 727 | |
6d3d44d9 N |
728 | if (fd1 < 0 || fd2 < 0) { |
729 | if (fd1>=0) close(fd1); | |
730 | if (fd2>=0) close(fd2); | |
731 | return 0; | |
732 | } | |
6d3d44d9 N |
733 | |
734 | devlist.next = NULL; | |
735 | devlist.used = 0; | |
736 | devlist.re_add = 0; | |
737 | devlist.writemostly = 0; | |
738 | devlist.devname = devname; | |
0fa21e85 | 739 | sprintf(devname, "%d:%d", major(devid), minor(devid)); |
6d3d44d9 N |
740 | |
741 | devlist.disposition = 'r'; | |
e78dda3b | 742 | if (Manage_subdevs(from->devname, fd2, &devlist, -1, 0) == 0) { |
6d3d44d9 | 743 | devlist.disposition = 'a'; |
e78dda3b N |
744 | if (Manage_subdevs(to->devname, fd1, &devlist, -1, 0) == 0) { |
745 | alert("MoveSpare", to->devname, from->devname, info); | |
6d3d44d9 N |
746 | close(fd1); |
747 | close(fd2); | |
748 | return 1; | |
749 | } | |
e78dda3b | 750 | else Manage_subdevs(from->devname, fd2, &devlist, -1, 0); |
6d3d44d9 N |
751 | } |
752 | close(fd1); | |
753 | close(fd2); | |
754 | return 0; | |
755 | } | |
756 | ||
e78dda3b N |
757 | static int check_donor(struct state *from, struct state *to, |
758 | struct domainlist *domlist) | |
2feb22ef | 759 | { |
66f5c4b6 N |
760 | struct state *sub; |
761 | ||
2feb22ef N |
762 | if (from == to) |
763 | return 0; | |
66f5c4b6 N |
764 | if (from->parent) |
765 | /* Cannot move from a member */ | |
2feb22ef | 766 | return 0; |
ff044d6b AC |
767 | if (from->err) |
768 | return 0; | |
66f5c4b6 N |
769 | for (sub = from->subarray; sub; sub = sub->subarray) |
770 | /* If source array has degraded subarrays, don't | |
771 | * remove anything | |
772 | */ | |
773 | if (sub->active < sub->raid) | |
774 | return 0; | |
775 | if (from->metadata->ss->external == 0) | |
776 | if (from->active < from->raid) | |
777 | return 0; | |
2feb22ef N |
778 | if (from->spare <= 0) |
779 | return 0; | |
e78dda3b | 780 | if (domlist == NULL) |
2feb22ef | 781 | return 0; |
e78dda3b | 782 | return 1; |
2feb22ef N |
783 | } |
784 | ||
0f0749ad | 785 | static dev_t choose_spare(struct state *from, struct state *to, |
0fa21e85 N |
786 | struct domainlist *domlist) |
787 | { | |
788 | int d; | |
0f0749ad | 789 | dev_t dev = 0; |
0fa21e85 N |
790 | unsigned long long min_size |
791 | = min_spare_size_required(to); | |
792 | ||
793 | for (d = from->raid; !dev && d < MaxDisks; d++) { | |
794 | if (from->devid[d] > 0 && | |
795 | from->devstate[d] == 0) { | |
796 | struct dev_policy *pol; | |
797 | unsigned long long dev_size; | |
798 | ||
799 | if (min_size && | |
800 | dev_size_from_id(from->devid[d], &dev_size) && | |
801 | dev_size < min_size) | |
802 | continue; | |
803 | ||
804 | pol = devnum_policy(from->devid[d]); | |
805 | if (from->spare_group) | |
806 | pol_add(&pol, pol_domain, | |
807 | from->spare_group, NULL); | |
808 | if (domain_test(domlist, pol, to->metadata->ss->name)) | |
809 | dev = from->devid[d]; | |
810 | dev_policy_free(pol); | |
811 | } | |
812 | } | |
813 | return dev; | |
814 | } | |
815 | ||
0f0749ad | 816 | static dev_t container_choose_spare(struct state *from, struct state *to, |
5739e0d0 N |
817 | struct domainlist *domlist) |
818 | { | |
819 | /* This is similar to choose_spare, but we cannot trust devstate, | |
820 | * so we need to read the metadata instead | |
821 | */ | |
822 | ||
823 | struct supertype *st = from->metadata; | |
ff044d6b | 824 | int fd = open(from->devname, O_RDONLY); |
5739e0d0 N |
825 | int err; |
826 | struct mdinfo *disks, *d; | |
827 | unsigned long long min_size | |
828 | = min_spare_size_required(to); | |
0f0749ad | 829 | dev_t dev = 0; |
5739e0d0 N |
830 | |
831 | if (fd < 0) | |
832 | return 0; | |
833 | if (!st->ss->getinfo_super_disks) | |
834 | return 0; | |
835 | ||
836 | err = st->ss->load_container(st, fd, NULL); | |
837 | close(fd); | |
838 | if (err) | |
839 | return 0; | |
840 | ||
841 | disks = st->ss->getinfo_super_disks(st); | |
842 | st->ss->free_super(st); | |
843 | ||
844 | if (!disks) | |
845 | return 0; | |
846 | ||
847 | for (d = disks->devs ; d && !dev ; d = d->next) { | |
848 | if (d->disk.state == 0) { | |
849 | struct dev_policy *pol; | |
850 | unsigned long long dev_size; | |
851 | dev = makedev(d->disk.major,d->disk.minor); | |
852 | ||
853 | if (min_size && | |
854 | dev_size_from_id(dev, &dev_size) && | |
24baa548 AC |
855 | dev_size < min_size) { |
856 | dev = 0; | |
5739e0d0 | 857 | continue; |
24baa548 | 858 | } |
5739e0d0 N |
859 | pol = devnum_policy(dev); |
860 | if (from->spare_group) | |
861 | pol_add(&pol, pol_domain, | |
862 | from->spare_group, NULL); | |
863 | if (!domain_test(domlist, pol, to->metadata->ss->name)) | |
864 | dev = 0; | |
865 | ||
866 | dev_policy_free(pol); | |
867 | } | |
868 | } | |
869 | sysfs_free(disks); | |
870 | return dev; | |
871 | } | |
872 | ||
873 | ||
e0bd6a96 | 874 | static void try_spare_migration(struct state *statelist, struct alert_info *info) |
2e0172b1 | 875 | { |
66f5c4b6 N |
876 | struct state *from; |
877 | struct state *st; | |
c3621c0a ML |
878 | |
879 | link_containers_with_subarrays(statelist); | |
66f5c4b6 N |
880 | for (st = statelist; st; st = st->next) |
881 | if (st->active < st->raid && | |
ef15641f | 882 | st->spare == 0 && !st->err) { |
e78dda3b N |
883 | struct domainlist *domlist = NULL; |
884 | int d; | |
66f5c4b6 N |
885 | struct state *to = st; |
886 | ||
887 | if (to->parent) | |
888 | /* member of a container */ | |
889 | to = to->parent; | |
e78dda3b N |
890 | |
891 | for (d = 0; d < MaxDisks; d++) | |
892 | if (to->devid[d]) | |
893 | domainlist_add_dev(&domlist, | |
894 | to->devid[d], | |
895 | to->metadata->ss->name); | |
896 | if (to->spare_group) | |
897 | domain_add(&domlist, to->spare_group); | |
898 | ||
0fa21e85 | 899 | for (from=statelist ; from ; from=from->next) { |
0f0749ad | 900 | dev_t devid; |
0fa21e85 N |
901 | if (!check_donor(from, to, domlist)) |
902 | continue; | |
5739e0d0 N |
903 | if (from->metadata->ss->external) |
904 | devid = container_choose_spare( | |
905 | from, to, domlist); | |
906 | else | |
907 | devid = choose_spare(from, to, domlist); | |
0fa21e85 N |
908 | if (devid > 0 |
909 | && move_spare(from, to, devid, info)) | |
6d3d44d9 | 910 | break; |
0fa21e85 | 911 | } |
e78dda3b | 912 | domain_free(domlist); |
2e0172b1 N |
913 | } |
914 | } | |
c3621c0a ML |
915 | |
916 | /* search the statelist to connect external | |
917 | * metadata subarrays with their containers | |
918 | * We always completely rebuild the tree from scratch as | |
919 | * that is safest considering the possibility of entries | |
920 | * disappearing or changing. | |
921 | */ | |
922 | static void link_containers_with_subarrays(struct state *list) | |
923 | { | |
924 | struct state *st; | |
925 | struct state *cont; | |
926 | for (st = list; st; st = st->next) { | |
927 | st->parent = NULL; | |
928 | st->subarray = NULL; | |
929 | } | |
930 | for (st = list; st; st = st->next) | |
931 | if (st->parent_dev != NoMdDev) | |
932 | for (cont = list; cont; cont = cont->next) | |
933 | if (!cont->err && | |
934 | cont->parent_dev == NoMdDev && | |
935 | cont->devnum == st->parent_dev) { | |
936 | st->parent = cont; | |
937 | st->subarray = cont->subarray; | |
938 | cont->subarray = st; | |
939 | break; | |
940 | } | |
941 | } | |
942 | ||
b90c0e9a NB |
943 | /* Not really Monitor but ... */ |
944 | int Wait(char *dev) | |
945 | { | |
946 | struct stat stb; | |
947 | int devnum; | |
948 | int rv = 1; | |
949 | ||
950 | if (stat(dev, &stb) != 0) { | |
951 | fprintf(stderr, Name ": Cannot find %s: %s\n", dev, | |
952 | strerror(errno)); | |
953 | return 2; | |
954 | } | |
c94709e8 | 955 | devnum = stat2devnum(&stb); |
b90c0e9a NB |
956 | |
957 | while(1) { | |
958 | struct mdstat_ent *ms = mdstat_read(1, 0); | |
959 | struct mdstat_ent *e; | |
960 | ||
961 | for (e=ms ; e; e=e->next) | |
962 | if (e->devnum == devnum) | |
963 | break; | |
964 | ||
965 | if (!e || e->percent < 0) { | |
e7783ee6 | 966 | if (e && e->metadata_version && |
c94709e8 DW |
967 | strncmp(e->metadata_version, "external:", 9) == 0) { |
968 | if (is_subarray(&e->metadata_version[9])) | |
969 | ping_monitor(&e->metadata_version[9]); | |
970 | else | |
971 | ping_monitor(devnum2devname(devnum)); | |
972 | } | |
b90c0e9a NB |
973 | free_mdstat(ms); |
974 | return rv; | |
975 | } | |
89a10d84 | 976 | free_mdstat(ms); |
b90c0e9a NB |
977 | rv = 0; |
978 | mdstat_wait(5); | |
979 | } | |
980 | } |