+/*
+ * mdmon - monitor external metadata arrays
+ *
+ * Copyright (C) 2007-2009 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2007-2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
/*
* The management thread for monitoring active md arrays.
{
struct mdinfo *d;
- for (d = aa->info.devs; d; d = d->next)
+ for (d = aa->info.devs; d; d = d->next) {
+ close(d->recovery_fd);
close(d->state_fd);
+ }
close(aa->action_fd);
close(aa->info.state_fd);
struct metadata_update *update_queue_handled = NULL;
struct metadata_update *update_queue_pending = NULL;
-void check_update_queue(struct supertype *container)
+static void free_updates(struct metadata_update **update)
{
- while (update_queue_handled) {
- struct metadata_update *this = update_queue_handled;
- update_queue_handled = this->next;
+ while (*update) {
+ struct metadata_update *this = *update;
+
+ *update = this->next;
free(this->buf);
- if (this->space)
- free(this->space);
+ free(this->space);
free(this);
}
+}
+
+void check_update_queue(struct supertype *container)
+{
+ free_updates(&update_queue_handled);
+
if (update_queue == NULL &&
update_queue_pending) {
update_queue = update_queue_pending;
*qp = mu;
}
-void wait_update_handled(void)
+static void add_disk_to_container(struct supertype *st, struct mdinfo *sd)
{
- /* Wait for any pending update to be handled by monitor.
- * i.e. wait until update_queue is NULL
+ int dfd;
+ char nm[20];
+ struct supertype *st2;
+ struct metadata_update *update = NULL;
+ struct mdinfo info;
+ mdu_disk_info_t dk = {
+ .number = -1,
+ .major = sd->disk.major,
+ .minor = sd->disk.minor,
+ .raid_disk = -1,
+ .state = 0,
+ };
+
+ dprintf("%s: add %d:%d to container\n",
+ __func__, sd->disk.major, sd->disk.minor);
+
+ sd->next = st->devs;
+ st->devs = sd;
+
+ sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
+ dfd = dev_open(nm, O_RDWR);
+ if (dfd < 0)
+ return;
+
+ /* Check the metadata and see if it is already part of this
+ * array
*/
- while (update_queue)
- usleep(100 * 1000);
+ st2 = dup_super(st);
+ if (st2->ss->load_super(st2, dfd, NULL) == 0) {
+ st2->ss->getinfo_super(st, &info);
+ if (st->ss->compare_super(st, st2) == 0 &&
+ info.disk.raid_disk >= 0) {
+ /* Looks like a good member of array.
+ * Just accept it.
+ * mdadm will incorporate any parts into
+ * active arrays.
+ */
+ st2->ss->free_super(st2);
+ return;
+ }
+ }
+ st2->ss->free_super(st2);
+
+ st->update_tail = &update;
+ st->ss->add_to_super(st, &dk, dfd, NULL);
+ st->ss->write_init_super(st);
+ queue_metadata_update(update);
+ st->update_tail = NULL;
}
static void manage_container(struct mdstat_ent *mdstat,
* about spare assignment.... probably not.
*/
if (mdstat->devcnt != container->devcnt) {
+ struct mdinfo **cdp, *cd, *di, *mdi;
+ int found;
+
/* read /sys/block/NAME/md/dev-??/block/dev to find out
* what is there, and compare with container->info.devs
* To see what is removed and what is added.
* These need to be remove from, or added to, the array
*/
- // FIXME
+ mdi = sysfs_read(-1, mdstat->devnum, GET_DEVS|SKIP_GONE_DEVS);
+ if (!mdi) {
+ /* invalidate the current count so we can try again */
+ container->devcnt = -1;
+ return;
+ }
+
+ /* check for removals */
+ for (cdp = &container->devs; *cdp; ) {
+ found = 0;
+ for (di = mdi->devs; di; di = di->next)
+ if (di->disk.major == (*cdp)->disk.major &&
+ di->disk.minor == (*cdp)->disk.minor) {
+ found = 1;
+ break;
+ }
+ if (!found) {
+ cd = *cdp;
+ *cdp = (*cdp)->next;
+ free(cd);
+ } else
+ cdp = &(*cdp)->next;
+ }
+
+ /* check for additions */
+ for (di = mdi->devs; di; di = di->next) {
+ for (cd = container->devs; cd; cd = cd->next)
+ if (di->disk.major == cd->disk.major &&
+ di->disk.minor == cd->disk.minor)
+ break;
+ if (!cd) {
+ struct mdinfo *newd = malloc(sizeof(*newd));
+
+ if (!newd) {
+ container->devcnt = -1;
+ continue;
+ }
+ *newd = *di;
+ add_disk_to_container(container, newd);
+ }
+ }
+ sysfs_free(mdi);
container->devcnt = mdstat->devcnt;
}
}
if (a->check_degraded) {
struct metadata_update *updates = NULL;
- struct mdinfo *newdev;
+ struct mdinfo *newdev = NULL;
struct active_array *newa;
- wait_update_handled();
+ struct mdinfo *d;
+
a->check_degraded = 0;
/* The array may not be degraded, this is just a good time
* to check.
*/
newdev = a->container->ss->activate_spare(a, &updates);
- if (newdev) {
- struct mdinfo *d;
- /* Cool, we can add a device or several. */
- newa = duplicate_aa(a);
- /* suspend recovery - maybe not needed */
-
- /* Add device to array and set offset/size/slot.
- * and open files for each newdev */
- for (d = newdev; d ; d = d->next) {
- struct mdinfo *newd;
- if (sysfs_add_disk(&newa->info, d) < 0)
- continue;
- newd = newa->info.devs;
- newd->state_fd = sysfs_open(a->devnum,
- newd->sys_name,
- "state");
- newd->prev_state
- = read_dev_state(newd->state_fd);
- newd->curr_state = newd->prev_state;
+ if (!newdev)
+ return;
+
+ newa = duplicate_aa(a);
+ if (!newa)
+ goto out;
+ /* Cool, we can add a device or several. */
+
+ /* Add device to array and set offset/size/slot.
+ * and open files for each newdev */
+ for (d = newdev; d ; d = d->next) {
+ struct mdinfo *newd;
+
+ newd = malloc(sizeof(*newd));
+ if (!newd)
+ continue;
+ if (sysfs_add_disk(&newa->info, d, 0) < 0) {
+ free(newd);
+ continue;
}
- queue_metadata_update(updates);
- replace_array(a->container, a, newa);
- sysfs_set_str(&a->info, NULL, "sync_action", "repair");
+ *newd = *d;
+ newd->next = newa->info.devs;
+ newa->info.devs = newd;
+
+ newd->state_fd = sysfs_open(a->devnum, newd->sys_name,
+ "state");
+ newd->prev_state = read_dev_state(newd->state_fd);
+ newd->curr_state = newd->prev_state;
+ }
+ queue_metadata_update(updates);
+ updates = NULL;
+ replace_array(a->container, a, newa);
+ sysfs_set_str(&a->info, NULL, "sync_action", "recover");
+ out:
+ while (newdev) {
+ d = newdev->next;
+ free(newdev);
+ newdev = d;
}
+ free_updates(&updates);
}
}
struct mdinfo *mdi, *di;
char *inst;
int i;
+ int failed = 0;
/* check if array is ready to be monitored */
if (!mdstat->active)
mdi = sysfs_read(-1, mdstat->devnum,
GET_LEVEL|GET_CHUNK|GET_DISKS|GET_COMPONENT|
- GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE);
+ GET_DEGRADED|GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE);
new = malloc(sizeof(*new));
if (i == di->disk.raid_disk)
break;
- if (di) {
+ if (di && newd) {
memcpy(newd, di, sizeof(*newd));
newd->state_fd = sysfs_open(new->devnum,
newd->sys_name,
"state");
+ newd->recovery_fd = sysfs_open(new->devnum,
+ newd->sys_name,
+ "recovery_start");
newd->prev_state = read_dev_state(newd->state_fd);
newd->curr_state = newd->prev_state;
} else {
- /* we cannot properly monitor without all raid_disks */
- new->container = NULL;
- break;
+ if (newd)
+ free(newd);
+
+ failed++;
+ if (failed > new->info.array.failed_disks) {
+ /* we cannot properly monitor without all working disks */
+ new->container = NULL;
+ break;
+ }
+ continue;
}
sprintf(newd->sys_name, "rd%d", i);
newd->next = new->info.devs;
new->action_fd = sysfs_open(new->devnum, NULL, "sync_action");
new->info.state_fd = sysfs_open(new->devnum, NULL, "array_state");
new->resync_start_fd = sysfs_open(new->devnum, NULL, "resync_start");
- get_resync_start(new);
+ new->metadata_fd = sysfs_open(new->devnum, NULL, "metadata_version");
dprintf("%s: inst: %d action: %d state: %d\n", __func__, atoi(inst),
new->action_fd, new->info.state_fd);
mdstat->metadata_version);
new->container = NULL;
free_aa(new);
- } else
+ } else {
replace_array(container, victim, new);
+ if (failed) {
+ new->check_degraded = 1;
+ manage_member(mdstat, new);
+ }
+ }
}
void manage(struct mdstat_ent *mdstat, struct supertype *container)
manage_container(mdstat, container);
continue;
}
- if (mdstat->metadata_version == NULL ||
- strncmp(mdstat->metadata_version, "external:/", 10) != 0 ||
- strncmp(mdstat->metadata_version+10, container->devname,
- strlen(container->devname)) != 0 ||
- mdstat->metadata_version[10+strlen(container->devname)]
- != '/')
+ if (!is_container_member(mdstat, container->devname))
/* Not for this array */
continue;
/* Looks like a member of this container */
struct metadata_update *mu;
- if (msg->len == 0) {
- int cnt = monitor_loop_cnt;
+ if (msg->len <= 0)
+ while (update_queue_pending || update_queue) {
+ check_update_queue(container);
+ usleep(15*1000);
+ }
+
+ if (msg->len == 0) { /* ping_monitor */
+ int cnt;
+
+ cnt = monitor_loop_cnt;
if (cnt & 1)
cnt += 2; /* wait until next pselect */
else
cnt += 3; /* wait for 2 pselects */
wakeup_monitor();
- wait_update_handled();
+
while (monitor_loop_cnt - cnt < 0)
usleep(10 * 1000);
- } else {
+ } else if (msg->len == -1) { /* ping_manager */
+ struct mdstat_ent *mdstat = mdstat_read(1, 0);
+
+ manage(mdstat, container);
+ free_mdstat(mdstat);
+ } else if (!sigterm) {
mu = malloc(sizeof(*mu));
mu->len = msg->len;
mu->buf = msg->buf;
{
struct mdstat_ent *mdstat;
sigset_t set;
+ int proc_fd;
sigprocmask(SIG_UNBLOCK, NULL, &set);
sigdelset(&set, SIGUSR1);
+ sigdelset(&set, SIGHUP);
+ sigdelset(&set, SIGALRM);
+ sigdelset(&set, SIGTERM);
+ proc_fd = open("/proc/mounts", O_RDONLY);
do {
if (exit_now)
exit(0);
- mdstat = mdstat_read(1, 0);
-
- manage(mdstat, container);
-
- read_sock(container);
-
- free_mdstat(mdstat);
+ /* Can only 'manage' things if 'monitor' is not making
+ * structural changes to metadata, so need to check
+ * update_queue
+ */
+ if (update_queue == NULL) {
+ mdstat = mdstat_read(1, 0);
+
+ manage(mdstat, container);
+
+ read_sock(container);
+
+ if (container->sock < 0 || socket_hup_requested) {
+ /* If this fails, we hope it already exists
+ * pid file lives in /var/run/mdadm/mdXX.pid
+ */
+ mkdir("/var", 0600);
+ mkdir("/var/run", 0600);
+ mkdir("/var/run/mdadm", 0600);
+ close(container->sock);
+ container->sock = make_control_sock(container->devname);
+ make_pidfile(container->devname, 0);
+ socket_hup_requested = 0;
+ }
+ if (container->sock < 0)
+ alarm(30);
+ free_mdstat(mdstat);
+ }
remove_old();
check_update_queue(container);
manager_ready = 1;
- mdstat_wait_fd(container->sock, &set);
+ if (sigterm)
+ wakeup_monitor();
+
+ if (update_queue == NULL) {
+ if (container->sock < 0)
+ mdstat_wait_fd(proc_fd, &set);
+ else
+ mdstat_wait_fd(container->sock, &set);
+ } else
+ /* If an update is happening, just wait for signal */
+ pselect(0, NULL, NULL, NULL, NULL, &set);
} while(1);
}
projects / thirdparty / mdadm.git / blobdiff