/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Neil Brown
- * Email: <neilb@cse.unsw.edu.au>
- * Paper: Neil Brown
- * School of Computer Science and Engineering
- * The University of New South Wales
- * Sydney, 2052
- * Australia
+ * Email: <neilb@suse.de>
*/
#include "mdadm.h"
#include "md_p.h"
#include "md_u.h"
#include <sys/wait.h>
-#include <sys/signal.h>
-#include <values.h>
+#include <signal.h>
+#include <limits.h>
+#include <syslog.h>
-static void alert(char *event, char *dev, char *disc, char *mailaddr, char *cmd);
+/* 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
+struct state {
+ char *devname;
+ int devnum; /* to sync with mdstat info */
+ long utime;
+ int err;
+ char *spare_group;
+ int active, working, failed, spare, raid;
+ int expected_spares;
+ int devstate[MaxDisks];
+ unsigned devid[MaxDisks];
+ int percent;
+ int parent_dev; /* For subarray, devnum of parent.
+ * For others, NoMdDev
+ */
+ struct supertype *metadata;
+ struct state *subarray;/* for a container it is a link to first subarray
+ * for a subarray it is a link to next subarray
+ * in the same container */
+ struct state *parent; /* for a subarray it is a link to its container
+ */
+ struct state *next;
+};
-static char *percentalerts[] = {
- "RebuildStarted",
- "Rebuild20",
- "Rebuild40",
- "Rebuild60",
- "Rebuild80",
+struct alert_info {
+ char *mailaddr;
+ char *mailfrom;
+ char *alert_cmd;
+ int dosyslog;
};
+static int make_daemon(char *pidfile);
+static int check_one_sharer(int scan);
+static void alert(char *event, char *dev, char *disc, struct alert_info *info);
+static int check_array(struct state *st, struct mdstat_ent *mdstat,
+ int test, struct alert_info *info,
+ int increments);
+static int add_new_arrays(struct mdstat_ent *mdstat, struct state *statelist,
+ int test, struct alert_info *info);
+static void try_spare_migration(struct state *statelist, struct alert_info *info);
+static void link_containers_with_subarrays(struct state *list);
-int Monitor(mddev_dev_t devlist,
+int Monitor(struct mddev_dev *devlist,
char *mailaddr, char *alert_cmd,
int period, int daemonise, int scan, int oneshot,
- char *config, int test, char* pidfile)
+ int dosyslog, int test, char *pidfile, int increments,
+ int share)
{
/*
* Every few seconds, scan every md device looking for changes
* An active device had a reverse transition
* RebuildStarted
* percent went from -1 to +ve
- * Rebuild20 Rebuild40 Rebuild60 Rebuild80
- * percent went from below to not-below that number
+ * RebuildNN
+ * percent went from below to not-below NN%
* DeviceDisappeared
* Couldn't access a device which was previously visible
*
* that appears in /proc/mdstat
*/
- struct state {
- char *devname;
- int devnum; /* to sync with mdstat info */
- long utime;
- int err;
- char *spare_group;
- int active, working, failed, spare, raid;
- int expected_spares;
- int devstate[MD_SB_DISKS];
- int devid[MD_SB_DISKS];
- int percent;
- struct state *next;
- } *statelist = NULL;
+ struct state *statelist = NULL;
int finished = 0;
struct mdstat_ent *mdstat = NULL;
+ char *mailfrom = NULL;
+ struct alert_info info;
if (!mailaddr) {
- mailaddr = conf_get_mailaddr(config);
+ 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 (!alert_cmd) {
- alert_cmd = conf_get_program(config);
+ alert_cmd = conf_get_program();
if (alert_cmd && ! scan)
fprintf(stderr, Name ": Monitor using program \"%s\" from config file\n",
alert_cmd);
fprintf(stderr, Name ": No mail address or alert command - not monitoring.\n");
return 1;
}
+ info.alert_cmd = alert_cmd;
+ info.mailaddr = mailaddr;
+ info.mailfrom = mailfrom;
+ info.dosyslog = dosyslog;
- 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");
+ if (daemonise)
+ if (make_daemon(pidfile))
+ return 1;
+
+ if (share)
+ if (check_one_sharer(scan))
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);
+ struct mddev_ident *mdlist = conf_get_ident(NULL);
for (; mdlist; mdlist=mdlist->next) {
- struct state *st = malloc(sizeof *st);
+ struct state *st;
+ if (mdlist->devname == NULL)
+ continue;
+ if (strcasecmp(mdlist->devname, "<ignore>") == 0)
+ continue;
+ st = calloc(1, sizeof *st);
if (st == NULL)
continue;
- st->devname = strdup(mdlist->devname);
- st->utime = 0;
+ if (mdlist->devname[0] == '/')
+ st->devname = strdup(mdlist->devname);
+ else {
+ st->devname = malloc(8+strlen(mdlist->devname)+1);
+ strcpy(strcpy(st->devname, "/dev/md/"),
+ mdlist->devname);
+ }
st->next = statelist;
- st->err = 0;
- st->devnum = MAXINT;
+ 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
- st->spare_group = NULL;
statelist = st;
}
} else {
- mddev_dev_t dv;
+ struct mddev_dev *dv;
for (dv=devlist ; dv; dv=dv->next) {
- mddev_ident_t mdlist = conf_get_ident(config, dv->devname);
- struct state *st = malloc(sizeof *st);
+ struct mddev_ident *mdlist = conf_get_ident(dv->devname);
+ struct state *st = calloc(1, sizeof *st);
if (st == NULL)
continue;
st->devname = strdup(dv->devname);
- st->utime = 0;
st->next = statelist;
- st->err = 0;
- st->devnum = MAXINT;
+ 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)
while (! finished) {
int new_found = 0;
struct state *st;
+ int anydegraded = 0;
if (mdstat)
free_mdstat(mdstat);
- mdstat = mdstat_read(oneshot?0:1);
-
- for (st=statelist; st; st=st->next) {
- mdu_array_info_t array;
- struct mdstat_ent *mse = NULL, *mse2;
- char *dev = st->devname;
- int fd;
- unsigned int i;
-
- if (test)
- alert("TestMessage", dev, NULL, mailaddr, alert_cmd);
- fd = open(dev, O_RDONLY);
- if (fd < 0) {
- if (!st->err)
- alert("DeviceDisappeared", dev, NULL,
- mailaddr, alert_cmd);
-/* fprintf(stderr, Name ": cannot open %s: %s\n",
- dev, strerror(errno));
-*/ st->err=1;
- continue;
- }
- if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
- if (!st->err)
- alert("DeviceDisappeared", dev, NULL,
- mailaddr, alert_cmd);
-/* fprintf(stderr, Name ": cannot get array info for %s: %s\n",
- dev, strerror(errno));
-*/ st->err=1;
- close(fd);
- continue;
- }
- if (array.level != 1 && array.level != 5 && array.level != -4 &&
- array.level != 6 && array.level != 10) {
- if (!st->err)
- alert("DeviceDisappeared", dev, "Wrong-Level",
- mailaddr, alert_cmd);
- st->err = 1;
- close(fd);
- continue;
- }
- if (st->devnum == MAXINT) {
- struct stat stb;
- if (fstat(fd, &stb) == 0 &&
- (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 (mse2 = mdstat ; mse2 ; mse2=mse2->next)
- if (mse2->devnum == st->devnum) {
- mse2->devnum = MAXINT; /* flag it as "used" */
- mse = mse2;
- }
+ mdstat = mdstat_read(oneshot?0:1, 0);
- if (st->utime == array.utime &&
- st->failed == array.failed_disks &&
- st->working == array.working_disks &&
- st->spare == array.spare_disks &&
- (mse == NULL || (
- mse->percent == st->percent
- ))) {
- close(fd);
- 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, alert_cmd);
-
- if (st->utime == 0 && /* new array */
- st->expected_spares > 0 &&
- array.spare_disks < st->expected_spares)
- alert("SparesMissing", dev, NULL, mailaddr, alert_cmd);
- if (mse &&
- st->percent == -1 &&
- mse->percent >= 0)
- alert("RebuildStarted", dev, NULL, mailaddr, alert_cmd);
- if (mse &&
- st->percent >= 0 &&
- mse->percent >= 0 &&
- (mse->percent / 20) > (st->percent / 20))
- alert(percentalerts[mse->percent/20],
- dev, NULL, mailaddr, alert_cmd);
-
- if (mse &&
- mse->percent == -1 &&
- st->percent >= 0)
- alert("RebuildFinished", dev, NULL, mailaddr, alert_cmd);
-
- if (mse)
- st->percent = mse->percent;
-
- for (i=0; i<MD_SB_DISKS; i++) {
- mdu_disk_info_t disc;
- 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 && mse->pattern && i < strlen(mse->pattern))
- switch(mse->pattern[i]) {
- case 'U': newstate = 6 /* ACTIVE/SYNC */; break;
- case '_': newstate = 0; break;
- }
- change = newstate ^ st->devstate[i];
- if (st->utime && change && !st->err) {
- 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 >= (unsigned)array.raid_disks &&
- (disc.major || disc.minor) &&
- st->devid[i] == MKDEV(disc.major, disc.minor) &&
- ((newstate&change)&(1<<MD_DISK_FAULTY))
- )
- alert("FailSpare", dev, dv, mailaddr, alert_cmd);
- 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);
- }
- st->devstate[i] = disc.state;
- st->devid[i] = MKDEV(disc.major, disc.minor);
- }
- close(fd);
- st->active = array.active_disks;
- st->working = array.working_disks;
- st->spare = array.spare_disks;
- st->failed = array.failed_disks;
- st->utime = array.utime;
- st->raid = array.raid_disks;
- st->err = 0;
- }
+ for (st=statelist; st; st=st->next)
+ if (check_array(st, mdstat, test, &info, increments))
+ anydegraded = 1;
+
/* 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 != MAXINT &&
- (strcmp(mse->level, "raid1")==0 ||
- strcmp(mse->level, "raid5")==0 ||
- strcmp(mse->level, "multipath")==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);
- 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);
- new_found = 1;
- }
- }
+ if (scan)
+ new_found = add_new_arrays(mdstat, statelist, test,
+ &info);
+
/* If an array has active < raid && spare == 0 && spare_group != NULL
* Look for another array with spare > 0 and active == raid and same spare_group
* if found, choose a device and hotremove/hotadd
*/
- for (st = statelist; st; st=st->next)
- if (st->active < st->raid &&
- st->spare == 0 &&
- st->spare_group != NULL) {
- struct state *st2;
- for (st2=statelist ; st2 ; st2=st2->next)
- if (st2 != st &&
- st2->spare > 0 &&
- st2->active == st2->raid &&
- st2->spare_group != NULL &&
- strcmp(st->spare_group, st2->spare_group) == 0) {
- /* try to remove and add */
- int fd1 = open(st->devname, O_RDONLY);
- int fd2 = open(st2->devname, O_RDONLY);
- int dev = -1;
- int d;
- if (fd1 < 0 || fd2 < 0) {
- if (fd1>=0) close(fd1);
- if (fd2>=0) close(fd2);
- continue;
- }
- for (d=st2->raid; d<MD_SB_DISKS; d++) {
- if (st2->devid[d] > 0 &&
- st2->devstate[d] == 0) {
- dev = st2->devid[d];
- break;
- }
- }
- if (dev > 0) {
- 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);
- close(fd1);
- close(fd2);
- break;
- }
- else ioctl(fd2, HOT_ADD_DISK, (unsigned long) dev);
- }
- }
- close(fd1);
- close(fd2);
- }
- }
+ if (share && anydegraded)
+ try_spare_migration(statelist, &info);
if (!new_found) {
if (oneshot)
break;
return 0;
}
+static int make_daemon(char *pidfile)
+{
+ 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", O_RDWR);
+ dup2(0,1);
+ dup2(0,2);
+ setsid();
+ return 0;
+}
-static void alert(char *event, char *dev, char *disc, char *mailaddr, char *cmd)
+static int check_one_sharer(int scan)
{
- if (!cmd && !mailaddr) {
+ int pid, rv;
+ FILE *fp;
+ char dir[20];
+ struct stat buf;
+ fp = fopen("/var/run/mdadm/autorebuild.pid", "r");
+ if (fp) {
+ fscanf(fp, "%d", &pid);
+ sprintf(dir, "/proc/%d", pid);
+ rv = stat(dir, &buf);
+ if (rv != -1) {
+ if (scan) {
+ fprintf(stderr, Name ": Only one "
+ "autorebuild process allowed"
+ " in scan mode, aborting\n");
+ fclose(fp);
+ return 1;
+ } else {
+ fprintf(stderr, Name ": Warning: One"
+ " autorebuild process already"
+ " running.");
+ }
+ }
+ fclose(fp);
+ }
+ if (scan) {
+ fp = fopen("/var/run/mdadm/autorebuild.pid", "w");
+ if (!fp)
+ fprintf(stderr, Name ": Cannot create"
+ " autorebuild.pid "
+ "file\n");
+ else {
+ pid = getpid();
+ fprintf(fp, "%d\n", pid);
+ fclose(fp);
+ }
+ }
+ return 0;
+}
+
+static void alert(char *event, char *dev, char *disc, struct alert_info *info)
+{
+ int priority;
+
+ if (!info->alert_cmd && !info->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) {
+ if (info->alert_cmd) {
int pid = fork();
switch(pid) {
default:
case -1:
break;
case 0:
- execl(cmd, cmd, event, dev, disc, NULL);
+ execl(info->alert_cmd, info->alert_cmd,
+ event, dev, disc, NULL);
exit(2);
}
}
- if (mailaddr &&
- (strncmp(event, "Fail", 4)==0 ||
+ if (info->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");
- fprintf(mp, "To: %s\n", mailaddr);
- fprintf(mp, "Subject: %s event on %s:%s\n\n", event, dev, hname);
+ if (info->mailfrom)
+ fprintf(mp, "From: %s\n", info->mailfrom);
+ else
+ fprintf(mp, "From: " Name " monitoring <root>\n");
+ fprintf(mp, "To: %s\n", info->mailaddr);
+ fprintf(mp, "Subject: %s event on %s:%s\n\n",
+ event, dev, hname);
- fprintf(mp, "This is an automatically generated mail message from " Name "\n");
+ fprintf(mp,
+ "This is an automatically generated"
+ " mail message from " Name "\n");
fprintf(mp, "running on %s\n\n", hname);
- fprintf(mp, "A %s event had been detected on md device %s.\n\n", event, dev);
+ 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 component 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");
- fclose(mp);
+
+ 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);
+ fclose(mdstat);
+ }
+ pclose(mp);
+ }
+ }
+
+ /* log the event to syslog maybe */
+ if (info->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);
+ }
+}
+
+static int check_array(struct state *st, struct mdstat_ent *mdstat,
+ int test, struct alert_info *ainfo,
+ int increments)
+{
+ struct { int state, major, minor; } info[MaxDisks];
+ mdu_array_info_t array;
+ struct mdstat_ent *mse = NULL, *mse2;
+ char *dev = st->devname;
+ int fd;
+ int i;
+
+ if (test)
+ alert("TestMessage", dev, NULL, ainfo);
+ fd = open(dev, O_RDONLY);
+ if (fd < 0) {
+ if (!st->err)
+ alert("DeviceDisappeared", dev, NULL, ainfo);
+ st->err=1;
+ return 0;
+ }
+ fcntl(fd, F_SETFD, FD_CLOEXEC);
+ if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
+ if (!st->err)
+ alert("DeviceDisappeared", dev, NULL, ainfo);
+ st->err=1;
+ close(fd);
+ return 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", ainfo);
+ st->err = 1;
+ close(fd);
+ return 0;
+ }
+ if (st->devnum == INT_MAX) {
+ struct stat stb;
+ if (fstat(fd, &stb) == 0 &&
+ (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 (mse2 = mdstat ; mse2 ; mse2=mse2->next)
+ if (mse2->devnum == st->devnum) {
+ mse2->devnum = INT_MAX; /* flag it as "used" */
+ mse = mse2;
+ }
+
+ if (!mse) {
+ /* duplicated array in statelist
+ * or re-created after reading mdstat*/
+ st->err = 1;
+ close(fd);
+ return 0;
+ }
+ /* this array is in /proc/mdstat */
+ if (array.utime == 0)
+ /* external arrays don't update utime, so
+ * just make sure it is always different. */
+ array.utime = st->utime + 1;;
+
+ if (st->utime == array.utime &&
+ st->failed == array.failed_disks &&
+ st->working == array.working_disks &&
+ st->spare == array.spare_disks &&
+ (mse == NULL || (
+ mse->percent == st->percent
+ ))) {
+ close(fd);
+ st->err = 0;
+ return 0;
+ }
+ if (st->utime == 0 && /* new array */
+ mse->pattern && strchr(mse->pattern, '_') /* degraded */
+ )
+ alert("DegradedArray", dev, NULL, ainfo);
+
+ if (st->utime == 0 && /* new array */
+ st->expected_spares > 0 &&
+ array.spare_disks < st->expected_spares)
+ alert("SparesMissing", dev, NULL, ainfo);
+ if (st->percent == -1 &&
+ mse->percent >= 0)
+ alert("RebuildStarted", dev, NULL, ainfo);
+ if (st->percent >= 0 &&
+ mse->percent >= 0 &&
+ (mse->percent / increments) > (st->percent / increments)) {
+ char percentalert[15]; // "RebuildNN" (10 chars) or "RebuildStarted" (15 chars)
+
+ if((mse->percent / increments) == 0)
+ snprintf(percentalert, sizeof(percentalert), "RebuildStarted");
+ else
+ snprintf(percentalert, sizeof(percentalert), "Rebuild%02d", mse->percent);
+
+ alert(percentalert, dev, NULL, ainfo);
+ }
+
+ if (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, ainfo);
+ } else
+ alert("RebuildFinished", dev, NULL, ainfo);
+ if (sra)
+ free(sra);
+ }
+ st->percent = mse->percent;
+
+ 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;
+ }
+
+ if (strncmp(mse->metadata_version, "external:", 9) == 0 &&
+ is_subarray(mse->metadata_version+9))
+ st->parent_dev =
+ devname2devnum(mse->metadata_version+10);
+ else
+ st->parent_dev = NoMdDev;
+ if (st->metadata == NULL &&
+ st->parent_dev == NoMdDev)
+ st->metadata = super_by_fd(fd, NULL);
+
+ close(fd);
+
+ for (i=0; i<MaxDisks; i++) {
+ mdu_disk_info_t disc = {0,0,0,0,0};
+ int newstate=0;
+ int change;
+ char *dv = NULL;
+ disc.number = i;
+ 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 < (int)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 &&
+ (((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, ainfo);
+ else if (i >= array.raid_disks &&
+ (disc.major || disc.minor) &&
+ st->devid[i] == makedev(disc.major, disc.minor) &&
+ ((newstate&change)&(1<<MD_DISK_FAULTY))
+ )
+ alert("FailSpare", dev, dv, ainfo);
+ else if (i < array.raid_disks &&
+ ! (newstate & (1<<MD_DISK_REMOVED)) &&
+ (((st->devstate[i]&change)&(1<<MD_DISK_FAULTY)) ||
+ ((newstate&change)&(1<<MD_DISK_ACTIVE)) ||
+ ((newstate&change)&(1<<MD_DISK_SYNC)))
+ )
+ alert("SpareActive", dev, dv, ainfo);
+ }
+ st->devstate[i] = newstate;
+ st->devid[i] = makedev(disc.major, disc.minor);
+ }
+ st->active = array.active_disks;
+ st->working = array.working_disks;
+ st->spare = array.spare_disks;
+ st->failed = array.failed_disks;
+ st->utime = array.utime;
+ st->raid = array.raid_disks;
+ st->err = 0;
+ if ((st->active < st->raid) && st->spare == 0)
+ return 1;
+ return 0;
+}
+
+static int add_new_arrays(struct mdstat_ent *mdstat, struct state *statelist,
+ int test, struct alert_info *info)
+{
+ struct mdstat_ent *mse;
+ int new_found = 0;
+
+ for (mse=mdstat; mse; mse=mse->next)
+ if (mse->devnum != INT_MAX &&
+ (!mse->level || /* retrieve containers */
+ (strcmp(mse->level, "raid0") != 0 &&
+ strcmp(mse->level, "linear") != 0))
+ ) {
+ struct state *st = calloc(1, 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);
+ if (st->metadata) {
+ st->metadata->ss->free_super(st->metadata);
+ free(st->metadata);
+ }
+ free(st);
+ continue;
+ }
+ close(fd);
+ st->next = statelist;
+ st->err = 1;
+ st->devnum = mse->devnum;
+ st->percent = -2;
+ st->expected_spares = -1;
+ if (strncmp(mse->metadata_version, "external:", 9) == 0 &&
+ is_subarray(mse->metadata_version+9))
+ st->parent_dev =
+ devname2devnum(mse->metadata_version+10);
+ else
+ st->parent_dev = NoMdDev;
+ statelist = st;
+ if (test)
+ alert("TestMessage", st->devname, NULL, info);
+ alert("NewArray", st->devname, NULL, info);
+ new_found = 1;
}
+ return new_found;
+}
+
+unsigned long long min_spare_size_required(struct state *st)
+{
+ int fd;
+ unsigned long long rv = 0;
+
+ if (!st->metadata ||
+ !st->metadata->ss->min_acceptable_spare_size)
+ return rv;
+
+ fd = open(st->devname, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ st->metadata->ss->load_super(st->metadata, fd, st->devname);
+ close(fd);
+ rv = st->metadata->ss->min_acceptable_spare_size(st->metadata);
+ st->metadata->ss->free_super(st->metadata);
+
+ return rv;
+}
+
+static int move_spare(struct state *from, struct state *to,
+ struct domainlist *domlist,
+ struct alert_info *info)
+{
+ struct mddev_dev devlist;
+ char devname[20];
+ unsigned long long min_size;
+ /* try to remove and add */
+ int fd1 = open(to->devname, O_RDONLY);
+ int fd2 = open(from->devname, O_RDONLY);
+ int dev = -1;
+ int d;
+ if (fd1 < 0 || fd2 < 0) {
+ if (fd1>=0) close(fd1);
+ if (fd2>=0) close(fd2);
+ return 0;
+ }
+ min_size = min_spare_size_required(to);
+ for (d = from->raid; dev < 0 && d < MaxDisks; d++) {
+ if (from->devid[d] > 0 &&
+ from->devstate[d] == 0) {
+ struct dev_policy *pol;
+ unsigned long long dev_size;
+
+ if (min_size &&
+ dev_size_from_id(from->devid[d], &dev_size) &&
+ dev_size < min_size)
+ continue;
+
+ pol = devnum_policy(from->devid[d]);
+ if (from->spare_group)
+ pol_add(&pol, pol_domain,
+ from->spare_group, NULL);
+ if (domain_test(domlist, pol, to->metadata->ss->name))
+ dev = from->devid[d];
+ dev_policy_free(pol);
+ }
+ }
+ if (dev < 0) {
+ close(fd1);
+ close(fd2);
+ return 0;
+ }
+
+ devlist.next = NULL;
+ devlist.used = 0;
+ devlist.re_add = 0;
+ devlist.writemostly = 0;
+ devlist.devname = devname;
+ sprintf(devname, "%d:%d", major(dev), minor(dev));
+
+ devlist.disposition = 'r';
+ if (Manage_subdevs(from->devname, fd2, &devlist, -1, 0) == 0) {
+ devlist.disposition = 'a';
+ if (Manage_subdevs(to->devname, fd1, &devlist, -1, 0) == 0) {
+ alert("MoveSpare", to->devname, from->devname, info);
+ close(fd1);
+ close(fd2);
+ return 1;
+ }
+ else Manage_subdevs(from->devname, fd2, &devlist, -1, 0);
+ }
+ close(fd1);
+ close(fd2);
+ return 0;
+}
+
+static int check_donor(struct state *from, struct state *to,
+ struct domainlist *domlist)
+{
+ struct state *sub;
+
+ if (from == to)
+ return 0;
+ if (from->parent)
+ /* Cannot move from a member */
+ return 0;
+ for (sub = from->subarray; sub; sub = sub->subarray)
+ /* If source array has degraded subarrays, don't
+ * remove anything
+ */
+ if (sub->active < sub->raid)
+ return 0;
+ if (from->metadata->ss->external == 0)
+ if (from->active < from->raid)
+ return 0;
+ if (from->spare <= 0)
+ return 0;
+ if (domlist == NULL)
+ return 0;
+ return 1;
+}
+
+static void try_spare_migration(struct state *statelist, struct alert_info *info)
+{
+ struct state *from;
+ struct state *st;
+
+ link_containers_with_subarrays(statelist);
+ for (st = statelist; st; st = st->next)
+ if (st->active < st->raid &&
+ st->spare == 0) {
+ struct domainlist *domlist = NULL;
+ int d;
+ struct state *to = st;
+
+ if (to->parent)
+ /* member of a container */
+ to = to->parent;
+
+ for (d = 0; d < MaxDisks; d++)
+ if (to->devid[d])
+ domainlist_add_dev(&domlist,
+ to->devid[d],
+ to->metadata->ss->name);
+ if (to->spare_group)
+ domain_add(&domlist, to->spare_group);
+
+ for (from=statelist ; from ; from=from->next)
+ if (check_donor(from, to, domlist)
+ && move_spare(from, to, domlist, info))
+ break;
+ domain_free(domlist);
+ }
+}
+
+/* search the statelist to connect external
+ * metadata subarrays with their containers
+ * We always completely rebuild the tree from scratch as
+ * that is safest considering the possibility of entries
+ * disappearing or changing.
+ */
+static void link_containers_with_subarrays(struct state *list)
+{
+ struct state *st;
+ struct state *cont;
+ for (st = list; st; st = st->next) {
+ st->parent = NULL;
+ st->subarray = NULL;
+ }
+ for (st = list; st; st = st->next)
+ if (st->parent_dev != NoMdDev)
+ for (cont = list; cont; cont = cont->next)
+ if (!cont->err &&
+ cont->parent_dev == NoMdDev &&
+ cont->devnum == st->parent_dev) {
+ st->parent = cont;
+ st->subarray = cont->subarray;
+ cont->subarray = st;
+ break;
+ }
+}
+
+/* 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;
+ }
+ devnum = stat2devnum(&stb);
+
+ 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) {
+ if (e && e->metadata_version &&
+ strncmp(e->metadata_version, "external:", 9) == 0) {
+ if (is_subarray(&e->metadata_version[9]))
+ ping_monitor(&e->metadata_version[9]);
+ else
+ ping_monitor(devnum2devname(devnum));
+ }
+ free_mdstat(ms);
+ return rv;
+ }
+ free_mdstat(ms);
+ rv = 0;
+ mdstat_wait(5);
}
- /* FIXME log the event to syslog maybe */
}
projects / thirdparty / mdadm.git / blobdiff