/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
#include "md_p.h"
#include "md_u.h"
#include <sys/wait.h>
-#include <sys/signal.h>
+#include <signal.h>
+#include <limits.h>
+#include <syslog.h>
-static void alert(char *event, char *dev, char *disc, char *mailaddr, char *cmd);
+static void alert(char *event, char *dev, char *disc, char *mailaddr, char *mailfrom,
+ char *cmd, int dosyslog);
-static char *percentalerts[] = {
+static char *percentalerts[] = {
"RebuildStarted",
"Rebuild20",
"Rebuild40",
"Rebuild80",
};
+/* The largest number of disks current arrays can manage is 384
+ * This really should be dynamically, but that will have to wait
+ * At least it isn't MD_SB_DISKS.
+ */
+#define MaxDisks 384
int Monitor(mddev_dev_t devlist,
char *mailaddr, char *alert_cmd,
- int period, int scan,
- char *config)
+ int period, int daemonise, int scan, int oneshot,
+ int dosyslog, int test, char* pidfile)
{
/*
* Every few seconds, scan every md device looking for changes
int err;
char *spare_group;
int active, working, failed, spare, raid;
- int devstate[MD_SB_DISKS];
- int devid[MD_SB_DISKS];
+ int expected_spares;
+ int devstate[MaxDisks];
+ int devid[MaxDisks];
int percent;
struct state *next;
} *statelist = NULL;
int finished = 0;
struct mdstat_ent *mdstat = NULL;
+ char *mailfrom = NULL;
+
+ if (!mailaddr) {
+ mailaddr = conf_get_mailaddr();
+ if (mailaddr && ! scan)
+ fprintf(stderr, Name ": Monitor using email address \"%s\" from config file\n",
+ mailaddr);
+ }
+ mailfrom = conf_get_mailfrom();
- if (!mailaddr && scan)
- mailaddr = conf_get_mailaddr(config);
- if (!alert_cmd && scan)
- alert_cmd = conf_get_program(config);
- if (scan && !mailaddr && !alert_cmd)
- return 0;
+ if (!alert_cmd) {
+ alert_cmd = conf_get_program();
+ if (alert_cmd && ! scan)
+ fprintf(stderr, Name ": Monitor using program \"%s\" from config file\n",
+ alert_cmd);
+ }
+ if (scan && !mailaddr && !alert_cmd) {
+ fprintf(stderr, Name ": No mail address or alert command - not monitoring.\n");
+ return 1;
+ }
+
+ if (daemonise) {
+ int pid = fork();
+ if (pid > 0) {
+ if (!pidfile)
+ printf("%d\n", pid);
+ else {
+ FILE *pid_file;
+ pid_file=fopen(pidfile, "w");
+ if (!pid_file)
+ perror("cannot create pid file");
+ else {
+ fprintf(pid_file,"%d\n", pid);
+ fclose(pid_file);
+ }
+ }
+ return 0;
+ }
+ if (pid < 0) {
+ perror("daemonise");
+ return 1;
+ }
+ close(0);
+ open("/dev/null", 3);
+ dup2(0,1);
+ dup2(0,2);
+ setsid();
+ }
if (devlist == NULL) {
- mddev_ident_t mdlist = conf_get_ident(config, NULL);
+ mddev_ident_t mdlist = conf_get_ident(NULL);
for (; mdlist; mdlist=mdlist->next) {
struct state *st = malloc(sizeof *st);
if (st == NULL)
st->devname = strdup(mdlist->devname);
st->utime = 0;
st->next = statelist;
- st->err = 1;
- st->devnum = -1;
+ st->err = 0;
+ st->devnum = INT_MAX;
st->percent = -2;
+ st->expected_spares = mdlist->spare_disks;
if (mdlist->spare_group)
st->spare_group = strdup(mdlist->spare_group);
else
} else {
mddev_dev_t dv;
for (dv=devlist ; dv; dv=dv->next) {
+ mddev_ident_t mdlist = conf_get_ident(dv->devname);
struct state *st = malloc(sizeof *st);
if (st == NULL)
continue;
st->devname = strdup(dv->devname);
st->utime = 0;
st->next = statelist;
- st->err = 1;
- st->devnum = -1;
+ st->err = 0;
+ st->devnum = INT_MAX;
st->percent = -2;
+ st->expected_spares = -1;
st->spare_group = NULL;
+ if (mdlist) {
+ st->expected_spares = mdlist->spare_disks;
+ if (mdlist->spare_group)
+ st->spare_group = strdup(mdlist->spare_group);
+ }
statelist = st;
}
}
while (! finished) {
+ int new_found = 0;
struct state *st;
if (mdstat)
free_mdstat(mdstat);
- mdstat = mdstat_read();
+ mdstat = mdstat_read(oneshot?0:1, 0);
for (st=statelist; st; st=st->next) {
+ struct { int state, major, minor; } info[MaxDisks];
mdu_array_info_t array;
- struct mdstat_ent *mse;
+ struct mdstat_ent *mse = NULL, *mse2;
char *dev = st->devname;
int fd;
- int i;
+ unsigned int i;
+ if (test)
+ alert("TestMessage", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
fd = open(dev, O_RDONLY);
if (fd < 0) {
if (!st->err)
alert("DeviceDisappeared", dev, NULL,
- mailaddr, alert_cmd);
+ mailaddr, mailfrom, alert_cmd, dosyslog);
/* fprintf(stderr, Name ": cannot open %s: %s\n",
dev, strerror(errno));
*/ st->err=1;
continue;
}
+ fcntl(fd, F_SETFD, FD_CLOEXEC);
if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
if (!st->err)
alert("DeviceDisappeared", dev, NULL,
- mailaddr, alert_cmd);
+ mailaddr, mailfrom, alert_cmd, dosyslog);
/* fprintf(stderr, Name ": cannot get array info for %s: %s\n",
dev, strerror(errno));
*/ st->err=1;
close(fd);
continue;
}
- if (st->devnum < 0) {
+ /* It's much easier to list what array levels can't
+ * have a device disappear than all of them that can
+ */
+ if (array.level == 0 || array.level == -1) {
+ if (!st->err)
+ alert("DeviceDisappeared", dev, "Wrong-Level",
+ mailaddr, mailfrom, alert_cmd, dosyslog);
+ st->err = 1;
+ close(fd);
+ continue;
+ }
+ if (st->devnum == INT_MAX) {
struct stat stb;
if (fstat(fd, &stb) == 0 &&
- (S_IFMT&stb.st_mode)==S_IFBLK)
- st->devnum = MINOR(stb.st_rdev);
+ (S_IFMT&stb.st_mode)==S_IFBLK) {
+ if (major(stb.st_rdev) == MD_MAJOR)
+ st->devnum = minor(stb.st_rdev);
+ else
+ st->devnum = -1- (minor(stb.st_rdev)>>6);
+ }
}
- for (mse = mdstat ; mse ; mse=mse->next)
- if (mse->devnum == st->devnum) {
- mse->devnum = -1; /* flag it as "used" */
- break;
+ for (mse2 = mdstat ; mse2 ; mse2=mse2->next)
+ if (mse2->devnum == st->devnum) {
+ mse2->devnum = INT_MAX; /* flag it as "used" */
+ mse = mse2;
}
if (st->utime == array.utime &&
st->err = 0;
continue;
}
+ if (st->utime == 0 && /* new array */
+ mse && /* is in /proc/mdstat */
+ mse->pattern && strchr(mse->pattern, '_') /* degraded */
+ )
+ alert("DegradedArray", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
+
+ if (st->utime == 0 && /* new array */
+ st->expected_spares > 0 &&
+ array.spare_disks < st->expected_spares)
+ alert("SparesMissing", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
if (mse &&
- st->percent == -1 &&
+ st->percent == -1 &&
mse->percent >= 0)
- alert("RebuildStarted", dev, NULL, mailaddr, alert_cmd);
+ alert("RebuildStarted", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
if (mse &&
st->percent >= 0 &&
mse->percent >= 0 &&
(mse->percent / 20) > (st->percent / 20))
alert(percentalerts[mse->percent/20],
- dev, NULL, mailaddr, alert_cmd);
+ dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
+
+ if (mse &&
+ mse->percent == -1 &&
+ st->percent >= 0) {
+ /* Rebuild/sync/whatever just finished.
+ * If there is a number in /mismatch_cnt,
+ * we should report that.
+ */
+ struct mdinfo *sra =
+ sysfs_read(-1, st->devnum, GET_MISMATCH);
+ if (sra && sra->mismatch_cnt > 0) {
+ char cnt[40];
+ sprintf(cnt, " mismatches found: %d", sra->mismatch_cnt);
+ alert("RebuildFinished", dev, cnt, mailaddr, mailfrom, alert_cmd, dosyslog);
+ } else
+ alert("RebuildFinished", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
+ if (sra)
+ free(sra);
+ }
if (mse)
st->percent = mse->percent;
-
- for (i=0; i<MD_SB_DISKS; i++) {
+
+
+ for (i=0; i<MaxDisks && i <= array.raid_disks + array.nr_disks;
+ i++) {
mdu_disk_info_t disc;
+ disc.number = i;
+ if (ioctl(fd, GET_DISK_INFO, &disc) >= 0) {
+ info[i].state = disc.state;
+ info[i].major = disc.major;
+ info[i].minor = disc.minor;
+ } else
+ info[i].major = info[i].minor = 0;
+ }
+ close(fd);
+
+ for (i=0; i<MaxDisks; i++) {
+ mdu_disk_info_t disc = {0};
int newstate=0;
int change;
char *dv = NULL;
disc.number = i;
- if (ioctl(fd, GET_DISK_INFO, &disc)>= 0) {
- newstate = disc.state;
- dv = map_dev(disc.major, disc.minor);
- } else if (mse && i < strlen(mse->pattern))
+ if (i > array.raid_disks + array.nr_disks) {
+ newstate = 0;
+ disc.major = disc.minor = 0;
+ } else if (info[i].major || info[i].minor) {
+ newstate = info[i].state;
+ dv = map_dev(info[i].major, info[i].minor, 1);
+ disc.state = newstate;
+ disc.major = info[i].major;
+ disc.minor = info[i].minor;
+ } else if (mse && mse->pattern && i < strlen(mse->pattern)) {
switch(mse->pattern[i]) {
case 'U': newstate = 6 /* ACTIVE/SYNC */; break;
case '_': newstate = 0; break;
}
+ disc.major = disc.minor = 0;
+ }
+ if (dv == NULL && st->devid[i])
+ dv = map_dev(major(st->devid[i]),
+ minor(st->devid[i]), 1);
change = newstate ^ st->devstate[i];
if (st->utime && change && !st->err) {
- if (i < array.raid_disks &&
+ if (i < (unsigned)array.raid_disks &&
(((newstate&change)&(1<<MD_DISK_FAULTY)) ||
((st->devstate[i]&change)&(1<<MD_DISK_ACTIVE)) ||
((st->devstate[i]&change)&(1<<MD_DISK_SYNC)))
)
- alert("Fail", dev, dv, mailaddr, alert_cmd);
- else if (i>=array.raid_disks &&
+ alert("Fail", dev, dv, mailaddr, mailfrom, alert_cmd, dosyslog);
+ else if (i >= (unsigned)array.raid_disks &&
(disc.major || disc.minor) &&
- st->devid[i] == MKDEV(disc.major, disc.minor) &&
+ st->devid[i] == makedev(disc.major, disc.minor) &&
((newstate&change)&(1<<MD_DISK_FAULTY))
)
- alert("FailSpare", dev, dv, mailaddr, alert_cmd);
- else if (i < array.raid_disks &&
+ alert("FailSpare", dev, dv, mailaddr, mailfrom, alert_cmd, dosyslog);
+ else if (i < (unsigned)array.raid_disks &&
(((st->devstate[i]&change)&(1<<MD_DISK_FAULTY)) ||
((newstate&change)&(1<<MD_DISK_ACTIVE)) ||
((newstate&change)&(1<<MD_DISK_SYNC)))
)
- alert("SpareActive", dev, dv, mailaddr, alert_cmd);
+ alert("SpareActive", dev, dv, mailaddr, mailfrom, alert_cmd, dosyslog);
}
- st->devstate[i] = disc.state;
- st->devid[i] = MKDEV(disc.major, disc.minor);
+ st->devstate[i] = newstate;
+ st->devid[i] = makedev(disc.major, disc.minor);
}
- close(fd);
st->active = array.active_disks;
st->working = array.working_disks;
st->spare = array.spare_disks;
/* now check if there are any new devices found in mdstat */
if (scan) {
struct mdstat_ent *mse;
- for (mse=mdstat; mse; mse=mse->next)
- if (mse->devnum > 0) {
+ for (mse=mdstat; mse; mse=mse->next)
+ if (mse->devnum != INT_MAX &&
+ (strcmp(mse->level, "raid0")!=0 &&
+ strcmp(mse->level, "linear")!=0)
+ ) {
struct state *st = malloc(sizeof *st);
+ mdu_array_info_t array;
+ int fd;
if (st == NULL)
continue;
st->devname = strdup(get_md_name(mse->devnum));
+ if ((fd = open(st->devname, O_RDONLY)) < 0 ||
+ ioctl(fd, GET_ARRAY_INFO, &array)< 0) {
+ /* no such array */
+ if (fd >=0) close(fd);
+ put_md_name(st->devname);
+ free(st->devname);
+ free(st);
+ continue;
+ }
+ close(fd);
st->utime = 0;
st->next = statelist;
st->err = 1;
st->devnum = mse->devnum;
st->percent = -2;
st->spare_group = NULL;
+ st->expected_spares = -1;
statelist = st;
- alert("NewArray", st->devname, NULL, mailaddr, alert_cmd);
+ alert("NewArray", st->devname, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
+ new_found = 1;
}
}
/* If an array has active < raid && spare == 0 && spare_group != NULL
if (fd2>=0) close(fd2);
continue;
}
- for (d=st2->raid; d<MD_SB_DISKS; d++) {
+ for (d=st2->raid; d < MaxDisks; d++) {
if (st2->devid[d] > 0 &&
st2->devstate[d] == 0) {
dev = st2->devid[d];
}
}
if (dev > 0) {
- if (ioctl(fd2, HOT_REMOVE_DISK,
+ if (ioctl(fd2, HOT_REMOVE_DISK,
(unsigned long)dev) == 0) {
if (ioctl(fd1, HOT_ADD_DISK,
(unsigned long)dev) == 0) {
- alert("MoveSpare", st->devname, st2->devname, mailaddr, alert_cmd);
+ alert("MoveSpare", st->devname, st2->devname, mailaddr, mailfrom, alert_cmd, dosyslog);
close(fd1);
close(fd2);
break;
close(fd2);
}
}
-
- sleep(period);
+ if (!new_found) {
+ if (oneshot)
+ break;
+ else
+ mdstat_wait(period);
+ }
+ test = 0;
}
+ if (pidfile)
+ unlink(pidfile);
return 0;
}
-static void alert(char *event, char *dev, char *disc, char *mailaddr, char *cmd)
+static void alert(char *event, char *dev, char *disc, char *mailaddr, char *mailfrom, char *cmd,
+ int dosyslog)
{
+ int priority;
+
if (!cmd && !mailaddr) {
time_t now = time(0);
-
+
printf("%1.15s: %s on %s %s\n", ctime(&now)+4, event, dev, disc?disc:"unknown device");
}
if (cmd) {
exit(2);
}
}
- if (mailaddr && strncmp(event, "Fail", 4)==0) {
+ if (mailaddr &&
+ (strncmp(event, "Fail", 4)==0 ||
+ strncmp(event, "Test", 4)==0 ||
+ strncmp(event, "Spares", 6)==0 ||
+ strncmp(event, "Degrade", 7)==0)) {
FILE *mp = popen(Sendmail, "w");
if (mp) {
+ FILE *mdstat;
char hname[256];
gethostname(hname, sizeof(hname));
signal(SIGPIPE, SIG_IGN);
- fprintf(mp, "From: " Name " monitoring <root>\n");
+ if (mailfrom)
+ fprintf(mp, "From: %s\n", mailfrom);
+ else
+ fprintf(mp, "From: " Name " monitoring <root>\n");
fprintf(mp, "To: %s\n", mailaddr);
fprintf(mp, "Subject: %s event on %s:%s\n\n", event, dev, hname);
fprintf(mp, "A %s event had been detected on md device %s.\n\n", event, dev);
- if (disc)
- fprintf(mp, "It could be related to componenet device %s.\n\n", disc);
+ if (disc && disc[0] != ' ')
+ fprintf(mp, "It could be related to component device %s.\n\n", disc);
+ if (disc && disc[0] == ' ')
+ fprintf(mp, "Extra information:%s.\n\n", disc);
fprintf(mp, "Faithfully yours, etc.\n");
+
+ mdstat = fopen("/proc/mdstat", "r");
+ if (mdstat) {
+ char buf[8192];
+ int n;
+ fprintf(mp, "\nP.S. The /proc/mdstat file currently contains the following:\n\n");
+ while ( (n=fread(buf, 1, sizeof(buf), mdstat)) > 0)
+ n=fwrite(buf, 1, n, mp); /* yes, i don't care about the result */
+ fclose(mdstat);
+ }
fclose(mp);
}
}
- /* FIXME log the event to syslog maybe */
+
+ /* log the event to syslog maybe */
+ if (dosyslog) {
+ /* Log at a different severity depending on the event.
+ *
+ * These are the critical events: */
+ if (strncmp(event, "Fail", 4)==0 ||
+ strncmp(event, "Degrade", 7)==0 ||
+ strncmp(event, "DeviceDisappeared", 17)==0)
+ priority = LOG_CRIT;
+ /* Good to know about, but are not failures: */
+ else if (strncmp(event, "Rebuild", 7)==0 ||
+ strncmp(event, "MoveSpare", 9)==0 ||
+ strncmp(event, "Spares", 6) != 0)
+ priority = LOG_WARNING;
+ /* Everything else: */
+ else
+ priority = LOG_INFO;
+
+ if (disc)
+ syslog(priority, "%s event detected on md device %s, component device %s", event, dev, disc);
+ else
+ syslog(priority, "%s event detected on md device %s", event, dev);
+ }
+}
+
+/* Not really Monitor but ... */
+int Wait(char *dev)
+{
+ struct stat stb;
+ int devnum;
+ int rv = 1;
+
+ if (stat(dev, &stb) != 0) {
+ fprintf(stderr, Name ": Cannot find %s: %s\n", dev,
+ strerror(errno));
+ return 2;
+ }
+ if (major(stb.st_rdev) == MD_MAJOR)
+ devnum = minor(stb.st_rdev);
+ else
+ devnum = -1-(minor(stb.st_rdev)/64);
+
+ while(1) {
+ struct mdstat_ent *ms = mdstat_read(1, 0);
+ struct mdstat_ent *e;
+
+ for (e=ms ; e; e=e->next)
+ if (e->devnum == devnum)
+ break;
+
+ if (!e || e->percent < 0) {
+ free_mdstat(ms);
+ return rv;
+ }
+ free(ms);
+ rv = 0;
+ mdstat_wait(5);
+ }
}
projects / thirdparty / mdadm.git / blobdiff